Summary Information
Title: Allegheny Observatory Records
Collection Number: UA.5.1
Creator: Allegheny Observatory.

Collection Dates: 1850-1977
Extent: 43.5 linear feet (98 boxes)

Language: English

The Astronomical Observatory was founded in 1858 by the Allegheny Telescope Association in Allegheny, PA (now the North Side of Pittsburgh) and deeded to the Western University of Pennsylvania (now the University of Pittsburgh) in 1867. The records contain directors files, administrative files, notebooks, drawings, mechanical drawings, photographic prints and negatives, news releases, newsclippings, historical documents, and articles written about the Observatory. Digital reproductions of selected photographs are available online.

ULS Archives Service Center
University of Pittsburgh Library System
7500 Thomas Boulevard
Pittsburgh, PA, 15260
Date Published:

February 1968

Finding aid prepared by Archives Service Center Staff. Historical Sketch and Bibliography compiled by Frank Nederhoff, February, 1968. Revisions occurred to the finding aid as a part of the encoding process in April, 2004.
Revision Description:
February 2013:
New materials added to finding aid by Ian McGlory in 2012-2013.


The appearance of the comet known as "Donati's Comet", discovered in Florence by Giovanni Donati on June 2, 1858, gave the initial stimulus to the founding of the observatory. Interest in the comets appearance caused a group of men (professional and business) to form the Allegheny Telescope Association. This group, among whom the most prominent were Professor Louis Bradley, Josiah King and Harvey Childs, met in Bradley's home on February 15, 1858, and resolved not only to found the A.T.A. but also to purchase a telescope.

On January 31, 1860, the A.T.A. ordered a 13-inch telescope from Henry Fitz of New York, and it was installed in 1861. On May 15, 1860, the A.T.A. officially adopted a constitution and by-laws, elected a board of directors, and appointed an Observatory Committee. This committee raised funds by subscription for the telescope and housed it in a new building which they called the "Allegheny Observatory" as it was centered on a hill on Perrysville Avenue in the old city of Allegheny.

Professor Bradley was custodian of the new telescope from 1861-1863. In 1865, Professor Philotus Dean, principal of Central High School in Pittsburgh, became first custodian of the Observatory. Both men served without pay, accepting the responsibility of the Observatory to promote the advance of science. Later in 1865, the A.T.A. deeded the telescope, the building and the land to the Western University of Pennsylvania (now University of Pittsburgh). In 1867, the official transfer was completed and Samuel Langley was appointed Director. Among many other accomplishments, Langley invented a device to measure the temperatures on the Sun's surface, known as a bolometer; "Standardized" time for railroad companies; and coined the terms "astrophysics" and "aerodynamics"

When Langley left to become Secretary of the Smithsonian in 1887, James Keeler became the acting director and used the 13" Fitz-Clark telescope to discover Saturn's rings were made of small particles instead of being one large disk. In the early 1890s, because of the increasing air pollution in Pittsburgh and the need for larger research facilities, a new building at a new site was designed. The new Allegheny observatory was built between 1900 and 1914 in Riverview Park. The old observatory was sold and at one point a hospital for an orphanage. The building was torn down in 1955.

The Fitz-Clark 13" is still used today. In 1974 a bequest in the memory of George Theiss was made to the Observatory allowing for renovations on the Thaw and Keeler Telescopes. The George W. Theiss Astronomical Laboratory was also established and houses machines used to measure stellar images obtained from telescopes. The Thaw lens was replaced in 1985.

Collection Scope and Content Notes

The records contain correspondence and letterpress books belonging to ten of the observatory's directors, directors' miscellany, notes, articles, and correspondence. Records also include administrative files, notebooks, drawings, mechanical drawings, photographic prints and negatives, news releases, news clippings, a scrapbook, and historical documents and articles written about the Observatory.

Note: Series I (Correspondence of Directors and Acting Directors); Series II (Letterpress books of Directors and Acting Directors); and Series IV (Correspondence of affiliated astronomers) have been microfilmed. A detailed unpublished index to items in those series appear in Indexes to the Microfilmed Correspondence of Directors, Acting Directors and Selected Astronomers Among the Records of the Allegheny Observatory held by the Archives. In addition a large portion of the correspondence and letterpress books of Director Frank Schlesinger were microfilmed by the Center of History of Physics of the American Institute of Physics and the Archives of Industrial Society. The Schlesinger correspondence, ranging from 1905 through 1941, which was held by both the Archives of Industrial Society and the Center of History of Physics, Yale University Library was microfilmed as part of the project, "Sources for History of Modern Astrophysics."

Note: Additional notes and information are located at the series level including brief biographies of Directors.

A new series was added with the 2009 deposit to include some files on students affiliated with the Observatory.

New Material Added: Additional material was added in 2013 and includes additions to Series I (Correspondence of Directors and Acting Directors), Series IV (Correspondence of affiliated astronomers); Series VI (Administrative Files); Series VIII (Graphic Materials), Series XII (Organizations and Societies), Series XIII (Publications) and Series XVII (Photographs). An additional series, Series XVII (Student Records) was also created.


The collection is arranged into the following 16 series:

Series I. Correspondence of Directors / Acting Directors, 1850-1977

Series II. Letterpress Books of Directors / Acting Directors, 1862-1910

Series III. Directors / Acting Directors Miscellany, 1863-1978

Series IV. Correspondence of Affiliated Astronomers, 1886-1972

Series V. Affiliated Astronomers Miscellany

Series VI. Administrative Files, 1858-1977

Series VII. Observation, 1869-1930

Series VIII. Graphic Materials, 1878-1910

Series IX. Publicity, 1893-1902

Series X. Newsclippings (Miscellaneous), 1907-1947

Series XI. Scrapbooks, 1873-1917

Series XII. Organizations and Societies, 1899-1960

Series XIII. Publications, 1870-1939

Series XIV. Correspondence (Miscellaneous), 1881-1900

Series XV. History, 1912-1987

Series XVI. Photographs, 1886-1922

Series XVII. Student Records, 1960-1977

Subject Terms

  • Astronomers -- Pennsylvania -- Pittsburgh -- Biography

Corporate Names
  • Allegheny Observatory.
  • American Astronomical Society.
  • Astronomical Society of Pittsburgh.
  • University of Pittsburgh.
  • Western University of Pennsylvania.

Personal Names
  • Brashear, John A. (John Alfred), 1840-1920
  • Jordan, Frank Craig, 1865-1941 -- Correspondence
  • Keeler, James Edward, 1857-1900 -- Correspondence
  • Langley, S. P. (Samuel Pierpont), 1834-1906 -- Correspondence
  • Schlesinger, Frank, 1871-1943 -- Correspondence

  • Clippings (Information artifacts)
  • Correspondence
  • Notebooks
  • Photographs
  • Records (Documents)

  • University of Pittsburgh

Access and Use
Access Restrictions:

Series XVII. Student Records are restricted. Some papers in Series XII, Publications, have restrictions on the student records in the section called Reprints and Scholarly Papers. Access to this material is based on researcher signing a memo of confidentiality.

Acquisition Information:

Original deposit by Nicholas Wagman, Director, Allegheny Observatory, on February 28, 1964. Second deposit of 9 boxes by Louis Coban on November 2, 2009.

Alternate Format:

Series I, II, and IV have been microfilmed. A detailed inventory of those items microfilmed can be found in the unpublished "Indexes to the Microfilmed Correspondence of Directors, Acting Directors and Selected Astronomers Among the Records of the Allegheny Observatory" located at the Archives Service Center. In addition, a large portion of the correspondence of Director Frank Schlesinger and his letterpress books were microfilmed by the Curator in History of Physics of the American Institute of Physics. The correspondence, ranging from 1905 through 1941, held by both the Archives Service Center and the Yale University Library, was microfilmed as part of the project, "Sources for History of Modern Astrophysics" and is available in AIS.1981.06 microfilm (Microfilm-cabinet 2, Drawer 9 and Microfilm-cabinet 3, Drawer 1).

Digital reproductions of selected photographs can be found at

Preferred Citation:

Allegheny Observatory Records, 1850-1967, UA.5.1, University Archives, Archives Service Center, University of Pittsburgh

Previous Citation:

Records of Allegheny Observatory, 1850-1967, ais 64.22, Archives of Industrial Society, Hillman Library, University of Pittsburgh.

Processing Information:

This collection was processed by Frank Nederhoff in 1968. The second deposit was processed by Ian McGlory from September 2012 through February 2013.


Permission for publication is given on behalf of the University of Pittsburgh as the owner of the physical items and is not intended to include or imply permission of the copyright holder, which must also be obtained.

Collection Inventory

Series I. Correspondence of Directors/Acting Directors, 1850-1977

Subseries 1. Samuel Pierpoint Langley, 1850-1896, 1899

Scope and Content Notes:

Samuel Pierpoint Langley was born in Roxbury, MA, on August 22, 1834 and was Director of the observatory from 1867-1887. After graduating from the Boston Latin School, he studied civil engineering and architecture. His first employment was as an assistant in the Observatory at Harvard University; soon afterwards he became an instructor at the United States Naval Academy at Annapolis. In 1867 Langley became the Director of the Allegheny Observatory which had been transferred from private hands to the Western University of Pennsylvania; at the same time he was elected to the chair of Astronomy and Physics at the University.

Langley's main field of interest was the sun. He made detailed drawings of sunspots, invented the bolometer (an instrument to measure the amount of heat in different parts of the sun's spectrum), and obtained accurate time by using the telescope and positions of the stars. He also made accurate time available to Pittsburgh, City Hall, and to local railroads--even the U.S. Naval Observatory used his system (Allegheny System) to supply the correct time to the nation. During his term Mr. William Thaw contributed much money to the Observatory as did Andrew Carnegie who stated: "This was my first considerable gift to an institution of learning." Langley left to become first assistant secretary and then secretary to the Smithsonian Institute. He remained in that position until his death in 1906. Samuel Pierpont Langley died in Aiken, South Carolina, on February 26, 1906.

Box 1
Folder 1 A
Folder 2 Ba-Be
Folder 3 Bi-Bu
Folder 4 Ca-Coo
Folder 5 Cop-De
Folder 6 Du-El
Folder 7 Er-Gilb
Folder 8 Gill-Gr
Folder 9 Ha-Hilga
Folder 10 Hilge-Ho
Folder 11 Hu-Ki
Folder 12 Ki-Lel
Folder 13 Les-Lone
Folder 14-18 Longitude
Folder 19 Lou-McG

Includes McConnel letter.

Folder 20 McI-Mai
Folder 21 Mal-May
Folder 22 Maz-Mid
Folder 23 Mil-Mt
Folder 24 Mu-Na
Folder 25 Ne-Ob

Box 2
Folder 26 Oi-Pee
Folder 27 Pem-Pen
Folder 28 Ph-Pi
Folder 29 Po-Rei
Folder 30 Rep-Roq
Folder 31 Roo-Sal
Folder 32 San-Sl
Folder 33 Smil-Smit
Folder 34 Sny-Stev
Folder 35 Stew-Te
Folder 36-42 Thaw
Folder 43 Th-Ts
Folder 44-45 U.S. Signal
Folder 46 U.S. Government Printing - U.S. Navy
Folder 47 Up-Was
Folder 48 Wat-We
Folder 49 Wht
Folder 50 Why-Y
Folder 50A Addendum, 1871-1899
To: Barns, Carl B. (U.S. Geological Survey, Washington, D.C.), March 31, 1886-November 14, 1887
To: Pennsylvania Company (O.H. Booth, Superintendent, Mansfield, Ohio), March 18, 1873
From: Goff, M.B. (Chancellor, Western University of Pennsylvania), November 30, 1899
From: Meysan, Charles, esq. (Pittsburgh), December 2, 1871

Subseries 2. Frank Washington Very, 1864-1895

Scope and Content Notes:

Frank Washington Very was Langley's assistant and was placed in charge of the observatory when Langley was appointed the Assistant Secretary of the Smithsonian Institution in 1887.

Box 3
Folder 51 A-B
Folder 52 C
Folder 53 D-G
Folder 54 H-J
Folder 55 K-L
Folder 56 M-P
Folder 57 Q-S
Folder 58 T-U
Folder 59 V-Z

Subseries 3. James Edward Keeler, 1887-1898

Scope and Content Notes:

James Edward Keeler was Director from 1891-1898. Keeler used the 13-inch telescope to make spectroscopic studies and discovered that the rings of Saturn are not solid but composed of a multitude of small particles. In 1898, he left to become director of Lick Observatory.

Folder 60 Ac-Al
Folder 61 Am
Folder 62 An-Astronomi
Folder 63 Astronomy-At
Folder 64 Au-Bar
Folder 65 Bau-Bi
Folder 66 Bl-Bos
Folder 67 Bot-Bri
Folder 68 Bro-Burc
Folder 69 Brue-Cal
Folder 70-73 Cam
Folder 74 Car-Chic
Folder 75 Chid-Clap

Box 4
Folder 76 Clar-Cod
Folder 77 Col-Cot
Folder 78 Cre
Folder 79 Cro-Da
Folder 80 De-Do
Folder 81 Dr-Dz
Folder 82 E
Folder 83 Fa-Fe
Folder 84 Fi-Fr
Folder 85 Gi-Gr
Folder 86-100 Hale

Box 5
Folder 101-102 Hale
Folder 103 Hall-Hapr
Folder 104 Har-Hau
Folder 105 Hay-Hof
Folder 106-108 Hol
Folder 109 Hou-Hu
Folder 110 Hy-Je
Folder 111 Ji-Jo
Folder 112 Ju
Folder 113 Ka-Ki
Folder 114 Ki-Led
Folder 115 Lem-Li
Folder 116 Lo
Folder 117 Lu-Mat
Folder 118 Man-Mil
Folder 119 Min-Nel
Folder 120 New-No
Folder 121 O-Pat
Folder 122-124 Pay

Box 6
Folder 125-127 Pay
Folder 128 Pe
Folder 129 Ph-Pie
Folder 130 Pih-Pot
Folder 131 Pr-Ramb
Folder 132 Rams-Reed
Folder 133 Rees-Roc
Folder 134 Rum-San
Folder 135 Sar-Scha
Folder 136 Schu-Si
Folder 137 Sh-So
Folder 138 Sp
Folder 139 Sta-Step
Folder 140 Steu-Sto
Folder 141 Str-Th
Folder 142 To-Ts
Folder 143 US
Folder 144 Un-Va
Folder 145-147 Vee
Folder 148 Vo-Wan
Folder 149-150 Wain

Box 7
Folder 151 Warr-Way
Folder 152 Way, M.
Folder 153 We-Will
Folder 154 Wil-Wol
Folder 155 Woo-Ye
Folder 156 Yo-Z
Folder 157 University of Pittsburgh (Western University of Pennsylvania)

Subseries 4. John Alfred Brashear, 1866-1903

Scope and Content Notes:

John Alfred Brashear was Director Pro Tem from 1898-1900. Brashear was originally a mill worker, but, encouraged by his friend S.P. Langley and financially supported by William Thaw, he became a renowned lens-maker, setting up the Brashear Company which constructed both the 30-inch Thaw Memorial Telescope and the James E. Keeler Memorial Telescope. In 1867 Brashear raised matching funds from Thaw and Carnegie and he and Keeler drew up plans for a new observatory and equipment. In 1898, Keeler declared "The Observatory's usefulness is at an end" due to antiquated equipment, the encroachment of homes, factories, and the smoky, hazy atmosphere which obscured vision. Brashear spoke eloquently for aid in constructing a new "Temple of the Skies," but both the Panic of 1893 and the War of 1898 hampered the raising of funds. Discouraged, Keeler left for Lick Observatory at the University of California.

When Keeler died in 1906, his ashes were placed in the crypt of the memorial telescope built for him. Brashear persevered in his efforts to build a new observatory, eventually raising the $300,000 needed and securing a plot of land in Riverview Park. Appropriately, when the new observatory was dedicated in 1912, he was master of ceremonies (as he had been at the laying of the cornerstone in 1900). Upon their deaths, the ashes of both Brashear and his wife were also enclosed in the crypt (with Keeler's ashes) of the Keeler Memorial Telescope--the tablet bears the inscription "We have loved stars too fondly to be fearful of the night," words chosen by Brashear from "The Old Astronomer to His Pupil," a poem by Sarah William.

Folder 158 B-Ca
Folder 159 Co-Hal
Folder 160-166 Har
Folder 167 Has-Hu
Folder 168 L
Folder 169 Ma
Folder 170 Mc-Pg
Folder 171 Ph-S
Folder 172-173 T
Folder 174 U-V
Folder 175 W
Folder 175A Addendum - Unsigned Letter, Pittsburgh, August 27, 1887

Subseries 5. F.L.O. Wadsworth, 1894-1905, 1907

Scope and Content Notes:

F.L.O. Wadsworth was Director from 1900-1905. It was during Wadsworth's directorship on October 20, 1900 that the cornerstone of the new building was laid. Modifying and adding to the plans he was mostly concerned with the supervision of the construction of the new buildings and instruments. He also exerted his influence, along with Brashear and the Observatory Committee, in raising the needed funds. The Observatory was completed in 1905, but the work of equipping it delayed dedication until 1912.

Box 8
Folder 176 Ab-Ae
Folder 177 Ab-Alb
Folder 178 Ale-Alle
Folder 179 Alli-American
Folder 180 American B-American J
Folder 181 American L-American W
Folder 182 Ames
Folder 183 Amh-Ar
Folder 184 Astronomic
Folder 185 Astronomics-Ay
Folder 186 Bac-Baker
Folder 187-189 Baker
Folder 190 Bakh
Folder 191 Bal-Barr
Folder 192 Barr-Bec
Folder 193 Bed-Ber
Folder 194 Bi
Folder 195 Bl-Bol
Folder 196 Bon
Folder 197 Bor-Bow
Folder 198-199 Bra
Folder 200 Bre-Brown

Box 9
Folder 201 Bou-Bur
Folder 202 Burn-By
Folder 203 Cad-Came
Folder 204 Camph
Folder 205 Can-Carnegie
Folder 206 Caregies
Folder 207 Cas-Cau
Folder 208 Cent
Folder 209 Chab-Chan
Folder 210 Chan-Chic
Folder 211 Chil
Folder 212 Chr-Clark, G.
Folder 213 Clark, U.
Folder 214 Cle
Folder 215 Cob-Col
Folder 216 Com-Cop
Folder 217 Cn-Cow
Folder 218 Cr
Folder 219 Cr-Dam
Folder 220 Dave-Davi, L.C.
Folder 221 Davi, H.
Folder 222 Davi W.-Der
Folder 223 Det-Di
Folder 224 Do
Folder 225 Dr

Box 10
Folder 226 Eb-Ec
Folder 227 Ed-Elk
Folder 228 Ell-En
Folder 229 Eq-Ev
Folder 230 Fa
Folder 231 Fe-For
Folder 232 Fos-Fow
Folder 233 Fra-Fri
Folder 234 Fro-fu
Folder 235 Ga-Gi
Folder 236 Gi-Go
Folder 237 Gr-Hag
Folder 238-244 Hale
Folder 245 Hall-Ham
Folder 246 Har
Folder 247 Has
Folder 248-249 Harv
Folder 250 Haw-Hen

Box 11
Folder 251 Her
Folder 252 Hev-Hoo
Folder 253 Hos-Howa
Folder 254 Howe-Hul
Folder 255 Hum-Hut
Folder 256 Hus-Ins
Folder 257 Int-Ir
Folder 258 Ja-Joh
Folder 259 Jon
Folder 260 Ju-Kat
Folder 261 Kay-Ke
Folder 262 Kev-Ki
Folder 263 Kin
Folder 264 Kk-Ko
Folder 265 Kra
Folder 266 Kre-Lawa
Folder 267 Lea-Leo
Folder 268 Les-Li
Folder 269 Loc-Loo
Folder 270-272 Lord
Folder 273 Lore-McA
Folder 274 MacB-McP
Folder 275 Mag-Marq

Box 12
Folder 276 Mari-Mel
Folder 277 Men-Merria
Folder 278 Merril
Folder 279 Merrit-Met
Folder 280 Mic-Mil
Folder 281 Min-Mou
Folder 282 Mur-Mut
Folder 283 My-Nam
Folder 284 Nat-Nau
Folder 285 New
Folder 286 Nich-Nis
Folder 287 Nors-North
Folder 288 North W-Observatoire C
Folder 289 Observatoire DeB-Observatoire Der
Folder 290 Observatoire DeZ-Observatoire M
Folder 291 Observatoire M-Observatoire N
Folder 292 Observatoire N-Observatoy C
Folder 293 Observatory G-Observatory T
Folder 294 Oe-Ol
Folder 295 On-Os
Folder 296 Pag-Pat
Folder 297 Pau-Pen
Folder 298 Per-Pet
Folder 299 Ph-Pic
Folder 300 Pie-Pit

Box 13
Folder 301 Pl-Pop
Folder 302 Por-Poy
Folder 303 Pra
Folder 304 Pre-Ram
Folder 305 Ras-Rat
Folder 306 Ray-Roose, A.
Folder 307 Reese, H.-Reg
Folder 308 Rep-Rie
Folder 309 Rob-Roo
Folder 310 R.T.-R.O.
Folder 311 Roy
Folder 312 Ru-Sca
Folder 313 Sch-Scho
Folder 314 Schu-Se
Folder 315 Sec-See
Folder 316 Sh-Smith
Folder 317 Smiths
Folder 318-321 Sn
Folder 322 Soc-Sol
Folder 323 Som-Stah
Folder 324 Standard R.
Folder 325 Standard U-Steb

Box 14
Folder 326-328 Stec
Folder 329 Ster-Sterr
Folder 330 Sted-Skw
Folder 331 Sti-Strab
Folder 332-333 Strat
Folder 334 Straw-Sy
Folder 335 Ta-Th
Folder 336 Ti-Tu
Folder 337 Uf-U.S.B.
Folder 338 U.S. C-U.S. Coa
Folder 339 U.S. Col-U.S. Ge
Folder 340 U.S. Gl-U.S.N.
Folder 341 U.S.O.-Univ
Folder 342 Up-Va
Folder 343 Ve-Wal
Folder 344 War-Wat
Folder 345 Web-Wesh
Folder 346 Westi-Whifn
Folder 347 Whill-Wilson L.
Folder 348 Wilson M.-Wood, E.M.
Folder 349 Wood, R.W.-Wu
Folder 350 Ya-Z (misc.)

Section: Addendum, 1894-1904

Folder 350A A-D
Folder 350B E-K
Folder 350C L-W

Subseries 6. Frank Schlesinger, 1899-1920, 1907

Scope and Content Notes:

Frank Schlesinger was Director from 1905-1920. Originally from Yerkes Observatory in Williams Bay, Wisconsin, Schlesinger was also president of the American Astronomical Society. His main research interest was the improvement of parallax measurements, a method of determining the distances to stars. The results of his investigations are world-renowned and he was considered an authority in that area of research. On the afternoon of Wednesday, August 28, 1912, the new observatory (Mr. Billquist was the chief architect) was dedicated and presented to the University of Pittsburgh. In the fall of 1907 Mrs. Christopher Lyman Magee donated funds to the Observatory for the purpose of establishing a publication for the research conducted by the Observatory which had been scattered throughout a variety of scientific periodicals. The first volume of the Allegheny Observatory came out in 1912 under the editorship of Frank Schlesinger. In 1920 Schlesinger left to assume the directorship of Yale Observatory.

Box 15
Folder 351 Ad
Folder 352 Ai-Al
Folder 353-355 American A
Folder 356 American I-Bak
Folder 357-358 Barn
Folder 359 Barn-Bon
Folder 360-365 Bos
Folder 366 Boy-Bra
Folder 367 Bre-By
Folder 368 Cam
Folder 369 Can-Cu
Folder 370 Da-Di
Folder 371 Do-Ed
Folder 372 Ei-Fow
Folder 373-375 Fox

Box 16
Folder 376 Fra-Fro
Folder 377-378 Fro
Folder 379 Fro-G
Folder 380-383 Hal
Folder 384 Har-Hy
Folder 385 In-Kaj
Folder 386-387 Kap
Folder 388 Kay-Le
Folder 389 Li-McD
Folder 390 McK-Ma
Folder 391 Mea
Folder 392 Mec-Mi
Folder 393 Na
Folder 394 Ne
Folder 395 Ni-Ph
Folder 396-400 Pic

Box 17
Folder 401-403 Pic
Folder 404 Pic-Roy
Folder 405-406 Ru
Folder 407 St. F-Sta
Folder 408 Ste-Tay
Folder 409 Th
Folder 410 Ti-Tr
Folder 411 Tu
Folder 412 U.S.
Folder 413 Va-Wan
Folder 414 War
Folder 415 We-Wo
Folder 416 Y-Z (and University Correspondence)

Section: Correspondence from AIS/Yale University Project

Scope and Content Notes:

This portion of the collection was microfilmed by the Curator in History of Physics of the American Institute of Physics. The correspondence, ranging from 1905 through 1941, held by both the Archives Service Center and the Yale University Library, was microfilmed as part of the project, Sources for History of Modern Astrophysics and is available as ais 81:6 microfilm.

Box 17a
Folder 1 Abbot (Smithsonian)
Acker, Louis (Western University)
Adams, C.E. (Lick Observatory)
Adams, E.
Adams Express
Folder 2 Adams, Walter (Mt. Wilson Solar Observatory)
Folder 3 Adlers, Cyrius (Smithsonian)
Aiken Co.
Air Service War Dept.
Aitken, R.G. (Lick Observatory), 1905-1911
Folder 4 Aitken, R.G. (Lick Observatory), 1912-1915
Folder 5 Aitken, R.G. (Lick Observatory), 1916-1918
Folder 6 Albrecht, S. (Astronomical Observatory - Argentina)
Alexander Bros.
Observatoire di Alger.
Allegheny Co. Light Co.
Allegheny Heating Co.
Allegheny Observatory
Folder 7 Allen, Frances
Allen, Leah (Wellesley College)
Allritson, Alice (Nantucket Maria Mitchell Assoc.)
Alter, Dinsmore (Allegheny Observatory), 1909-1910
Folder 8 Alter, Dinsmore (Allegheny Observatory), 1911-1912
Folder 9 Alter, Dinsmore (Allegheny Observatory), 1913
Folder 10 Alter, Dinsmore (Allegheny Observatory), 1914-1919
Folder 11 Aluminum Rectifiers Co.
Ambrose, Fred
American Astronomical Society
Folder 12 American Electrical Heater Co.
American Express Co.
American Shipping Co.
American Warming and Ventilating
Ames, J. S. (Johns Hopkins University)
Ames, M. (Chemical Works)
Ankrom, Anna
Anderson, A.H.
Anderson, J. A. (Johns Hopkins University)
Apparatus on Loan
Appleton (D.) and Co.
Arbuthnot, Th. (University of Pittsburgh)
Folder 13 Archenold, F.S. (Treptow - Sternwarte)
Armstrong. (Treasury Dept.)
Arnaud, J.J.
Folder 14 Asthus
Astronomical and Astrophysical Society of America
Astronomical Journal
Astronomical Society of Wales
Atlantic Refining Co.
Folder 15 Azearate, T. (de Institute and Observatory of Marina of San Fernando)
Backlund, O. (Observatory Fulkowa, Russia)
Bacon, Robert
Bailey, Frank K.
Bailey, Solon S. (Harvard)
Folder 16 Baillaud, B. (Paris Observatory)
Baird Machinery Co.
Baker Office Furniture
Baker, Robert H. Amherst Observatory, 1906-1910
Folder 17 Baker, Robert H. Amherst Observatory, 1911
Folder 18 Baker, Robert H. Amherst Observatory, 1912-1919
Folder 19 Baker and Taylor Co.
Baldwin, H. A. (YMCA)
Bane, Herman H. (War Dept.)
Barber, Ethel F. (University of Pittsburgh)
Folder 20 Barnard, E.E. (Yerkes), 1904-1910
Folder 21 Barnard, E.E. (Yerkes), 1911-1913
Folder 22 Barnard, E.E. (Yerkes), 1914
Folder 23 Barnard, E.E. (Yerkes), 1915-1919
Folder 24 Barr, G.M. (British Astronomical Assoc.)
Barrett, Storrs B. (Yerkes)
Barritt, Leon (Monthly Evening Sky Map)
Barrows, Albert (American Assoc. for Advancement of Sciences)
Bartberger, C.M.
Folder 25 Barth, Johanna
Bartlett, H.N. (Westinghouse)
Bauer, L.A. (Carnegie Institute of Washington)

Box 17b
Folder 1 Beal, A.F. (U.S. Coast and Geodetic Survey)
Folder 2 Bealor, John T.
Bucher, Jacob, F. (Waynesburg College)
Bellows, John
Belopolsky, A. (Sternwarte)
Benjamin, Marcus (U.S. National Museum)
Bentabal, Horacio (Engineer of Mines and Law, Madrid)
Bentley, E.A. (Pittsburgh Fire Extinguisher Co.)
Folder 3 Biddle, James G.
Biesbroeck, G.
Bigalow, Ralph K.
Bigelow, Edward F.
Folder 4 Bigelow, Harriet W. (Smith College Observatory)
Billings (New York Public Library)
Billquist, T. E.
Birbirish, A.
Black, A. and C.
Blair, G.B. (Washburn College, Morningside College)
Folder 5 Blarcom
Block, Dorothy
Blum, Louis P. (W.G. Wilkins co.)
Boggs and Buhl
Bohlin, K.
Folder 6 Bond, J. L.
Bower, Ernest Clare (U.S. Naval Observatory)
Borgmann, Emil
Borst, G. W. (The Electric Club)
Boss, Benjamin (Dudley Observatory), 1908-1913
Folder 7 Boss, Benjamin (Dudley Observatory), 1914-1920
Folder 8 Boss, Lewis (Carnegie Institution)
Bouardi, J.
Boudin, Samuel
Bouesley, George T. (Engineer's Society)
Bowes, Homer
Bowie, William (Dept. of Labor and Commerce)
Folder 9 Brand, A.
Brasch, F. E.
Brashear, John A.
Folder 10 Brashear, John A. Co., Ltd., 1906-1908
Folder 11 Brashear, John A. Co., Ltd., 1909-1910
Folder 12 Brown, Charles O. (Mellon Institute)
Brown, G.W. (Yale University)
Brown, (Morris and Co.)
Buchanan, J.S.
Burger, William J.
Burke, George (Dept. of Public Works)
Folder 13 Burns, Kievin (Dept. of Commerce)
Burroughs Adding Machine Co.
Butler, C.P. (Solar Physics Observatory, Cambridge)
Byrd, Mary E. (Smith College Observatory)
Cadmus, W.R.
Folder 14 Callery, J.D. (Pittsburgh Railway Co.)
Calvert, Mary R. (Yerkes)
Cambridge Philosophical Society
Cameron, M. (Curtiss Aeroplanes and Motors, Ltd.)
Campbell, W.W. (Lick Observatory), 1904-1906
Folder 15 Campbell, W.W. (Lick Observatory), 1907-1909
Folder 16 Campbell, W.W. (Lick Observatory), 1910
Folder 17 Campbell, W.W. (Lick Observatory), 1911-1912
Folder 18 Campbell, W.W. (Lick Observatory), 1913
Folder 19 Campbell, W.W. (Lick Observatory), 1914
Folder 20 Campbell, W.W. (Lick Observatory), 1915
Folder 21 Campbell, W.W. (Lick Observatory), 1916-1919
Folder 22 Canada (Astronomical Society of)
Cannon, Annie J. (Harvard College Observatory)
Folder 23 Cannon, J.B. (Ottawa Observatory)
Cape of Good Hope Royal Observatory
Cargill, J.F.
Carlin, Thomas H.
Carmalt, Alice M. (University of Pittsburgh)
Carnegie Foundation for Advancement of Teaching
Folder 24 Carnegie Institute of Technology
Carnegie Institute of Washington
Carnegie, Louise W.
Carnegie Steel Co.
Carnegie Technical Schools
Folder 25 Carson and White Co.
Cater Electric Co.
Carus, Paul (The Monist - The Open Court)
Casey, Rev. Walter D. (St. Patrick's Rectory)
Folder 26 Cattell, J. McKeen (Popular Science Monthly)
Central District and Printing Telegraph Co.
Folder 27 Challinor, William
Chance Bros. And Co., Ltd.
Chance, F. L. (Yale University)
Chandler, C.F. (Columbia University)
Folder 28 Chant, C.A. (University of Toronto)
Chateau Freres and Cie
Folder 29 Chevreuse Observatory
Chollon, L.
Civera University of Ebro
E. Howard Clock Co., 1905
Folder 30 E. Howard Clock Co., 1906-1909
Folder 31 Coast Survey
Folder 32 Coblentz, W.W.
Coe College
Cohn, Fritz (Pecher Institute)
Coleman, George
Columbia University
Compton, Alfred G. (College of the City of New York)
Folder 33 Comstock, George C. (MIT Astronomical and Astrophysical Society)
Cocke, F. and Sons
Cooper, W.J.
Folder 34 Cortie, Rev. A.L. (Stonyhurst College)
Concrete Steel Construction Co.
Cotsworth, M.E. (Direct Calculators)
Cottam, Vincent W.
Cowperthwaite, M.F. (U.S. Senate)
Cox, Harry w. Ltd.
Coyne, John F.
Folder 35 Cramer Dry Plate Co.
Craven and Jackson
Craver, Harrison A. (Carnegie Library)
Crawford, Nettie J.
Crerar (John) Library
Cresson (George V.) Co.

Box 17c
Folder 1 Crew, Henry (Northwestern University)
Crommelin, A.C.D. (Royal Observatory)
Cross, Charles P. (MIT)
Cummings, Edith E. (Lick Observatory)
Cummons, J.W.
Cunningham, John W.
Folder 2 Curtis, Heber D. (Lick Observatory)
Folder 3 Curtiss, Ralph H. (Lick - Detroit Observatory - Allegheny Observatory), 1905-1908
Folder 4 Curtiss, Ralph H. (Lick - Detroit Observatory - Allegheny Observatory), 1909-1919
Folder 5 Cushing, C.B. (Frick and Lindsay Co.)
Customs Treasury Dept.
Dalby (R.H.) and Co.
Daniel, Laccheus (Princeton University)
Folder 6 Danifot (University of California)
Danler and Cie
Danner, F.J., Jr.
Folder 7 Davidson, George (University of California)
Davis, Alice E.
Davis, Herman S. (International Geodetic Assoc.)
Folder 8 Davis, John K.
Davis, K.E. (University of Pittsburgh)
Davis, Raymond C. (University of Michigan)
Davis, Robert L. (Westinghouse)
Davis, W.M.
Folder 9 Day, Arthur L. (National Academy of Science)
Day, David F.
Day, George Parmly (Yale University)
Deans of the University (University of Pittsburgh), 1913
Folder 10 Deans of the University (University of Pittsburgh), 1913
Folder 11 Deans of the University (University of Pittsburgh), 1914
Folder 12 Dempster, A.
Denison University
Denton (Joseph Horne Co.)
Detroit Publishing Co.
Dewey, John (Columbia University)
Diden, J. Gordon
Diks, A.W.
Doberck, W.
Dodge, Otis
Dormtous, Charles (Westinghouse Electric)
Dodd, L.E. (Bureau of Standards)
Folder 13 Doolittle, C.L. (American Philosophical Society)
Doolittle, Eric (University of Pennsylvania)
Folder 14 Doubleday-Hill Electric Co.
Folder 15 Douglass, A.E. (University of Arizona)
Downs, Louis (the Associated Charities of Pittsburgh)
Dudley, P.H. (New York Central and Hudson River Rail Road Co.)
Dugan, Raymond S. (Princeton University Observatory)
Folder 16 Duncan, J.C.
Duncan, Robert K. (Mellon Institute of Industrial Research)
Du Rig, A.H.
Dwyer, Michael D.
Dyson, F.W. (Royal Observatory of Edinburgh)
Folder 17 Eastman Kodak Co.
Ebert, A.G. (Technological Branch - U.S. Geological Survey)
Eckls, F.H. (University of Pittsburgh)
Eddington, A.S. (Observatory Cambridge)
Folder 18 Eder Construction Co., 1906
Folder 19 Eder Construction Co., 1909
Folder 20 Edinburgh (Royal Observatory)
Edward, George Co.
Eggers, Edward E. (Carnegie Library)
Eichelberger, W.S. (U.S. Naval Observatory)
Folder 21 Eimer and Amend
Folder 22 Electric Storage Battery Co.
Folder 23 Elston, Catherine (Western University of Pennsylvania)
Engelman, Wilhelm
Equiley, John (College of the City of New York)
Evens, P.B. (University of Cincinnati)
Folder 24 Excelsior Diary
Fagginger, A.C.
Fales, E.N.
Farrington, R.P. (School of Mines - University of Pittsburgh)
Faulkner, Richard B. (Alumni Assoc. of Columbia University)
Folder 25 Faunce, M.D. (Republic Iron and Steel Co.)
Favaro International Astronomical Station of Carloforte
Finley, John H. (College of the City of New York)
Finndlick, E. Finlay
Board of Fire Underwriters
Fisher, G.C.
Fisher, Henry (Standard Underground Cable Co.)
Fitchett, H.W.
Fleming, George T.
Fleming, Williamina P. (Harvard College Observatory)
Folder 26 Flint, A.S. (Washburn Observatory University of Wisconsin)
Flowtow, A.
Fock, Buchhandlung Gustav
Fowler, A. (Royal College of Science)
Fowler, Mary (Vassar College)
Folder 27 Fox, Phillip (Northwestern University), 1908-1911
Folder 28 Fox, Phillip (Northwestern University), 1912-1913
Folder 29 Fox, Phillip (Northwestern University), 1914
Folder 30 Fox, Phillip (Northwestern University), 1919-1920
Folder 31 French, H.W. Co.
Fric, Josef and Jan
Folder 32 Frost, A.E. (Western University of Pennsylvania), 1904-1907
Folder 33 Frost, A.E. (Western University of Pennsylvania), 1908-1909
Folder 34 Frost, A.E. (Western University of Pennsylvania), 1910
Folder 35 Frost, A.E. (Western University of Pennsylvania), 1911

Box 17d
Folder 1 Frost, A.E. (Western University of Pennsylvania), January-February 1911
Folder 2 Frost, A.E. (Western University of Pennsylvania), March-April 1911
Folder 3 Frost, A.E. (Western University of Pennsylvania), May-December 1911
Folder 4 Frost, A.E. (Western University of Pennsylvania), 1912-1913
Folder 5 Frost, A.E. (Western University of Pennsylvania), 1914
Frost, Edwin B. (Yerkes)
Folder 6 The Fullman Co.
Fulmer, Elmer E.
Furness, Caroline E. (Vassar College Observatory)
Folder 7 Gaertner, William and Co., 1905-1913
Folder 8 Gaertner, William and Co., 1914-1920
Folder 9 Gale, Henry (University of Chicago)
Gallo. (National Astronomical Observatory)
Gamble, A. (Sidney H.S.)
Gauthier - Villars
Gazetter Times (Pittsburgh)
Genova (R. Instituto Idrografico)
National Geographic Society
Folder 10 Geophysical
George, Rev. W. (Henry Geneva College)
Gerish (James H. Rhodes and Co.)
German Club of Pittsburgh
Folder 11 Gill, David
Gillespie, F.D.
Githeng, C.E. (Franklin College)
Gluncey, A. Estelle
Golden and Crick
Gopes, F.
Gosden, Thomas (Western Union Telegraph Co.)
Goulandris, E. (National Observatory of Athens)
Folder 12 Graduate Council of the University of Pittsburgh,
Folder 13 Graduate Council of the University of Pittsburgh, 1912
Folder 14 Graduate Council of the University of Pittsburgh, 1913
Folder 15 Graduate Council of the University of Pittsburgh, 1914
Folder 16 Graduate Council of the University of Pittsburgh, 1916
Folder 17 Graduate Council of the University of Pittsburgh, 1917
Folder 18 Graham, Ben G. (The High School, Greensburg, PA)
Gray, B. (War Dept.)
Green, Henry J.
Green, Stephen Co.
Greenwood and Sons
Grosjean, Charles
Folder 19 Grossmann, E.
Gundersen, May
Gunnell, L. (Smithsonian Institution)
W. and L. E. Gurley
Guthnick, P.
Hadley (Yale University)
Haeny, M.
Folder 20 Hagen, J.G. (Specola Vaticana)
Hall, Arthur W. (Scientific Co.)
Folder 21 Hale, George E. (Mt. Wilson)
Folder 22 Halsapple, F.F. (Juniata College)
Hamerschlag (Carnegie Technical Schools)
Hamilton, C.H. (Rasner and Dinger Co.)
Hammer Dry Plate Co.
Hammond, John (U.S. Naval Observatory)
Hamy, M.
Handgrove, M.R. (Pennsylvania Railroad)
Harmon (St. John's College)
The Harmsworth Encyclopedia
Harper, W.E. (Dept. of Interior)
Harris, L.H. (School of Engineering, University of Pittsburgh)
Harris (Philip) and Co., Ltd.
Folder 23 Harper, W.E. (Dept. of Interior)
Hartmann (Astrophysikalishes Observatory, Potsdam)
Harwood, M.
Hassel, Karl (School of Eng., University of Pittsburgh)
Hasselberg, B.
Folder 24 Hastings, Charles (Yale University)
Folder 25 Haussman, K.
Hawkers, Julia
Hawkesworth, Alan S. (Carnegie Library)
Hayford, John F. (Northwestern University)
Haynes, E.S. (Laws Observatory)
Hays, S. Mimis (American Philosophical Society)
Hendrick, Henry B. (Nautical Almanac Office)
Folder 26 Heger, Mary Lee (University of California)
Henck, J.B.
Hendrickson - Maytham Co.
Henroteau, F. (Lick Observatory)
Herda, C.
Herr, E.M. (Westinghouse)
Herron, J.W.
Folder 27 Hertzsprang, Rjnar
Folder 28 Hildebrandson, H.H.
Higer (A.), Ltd.
Hinchman, Lydia S. (Maria Mitchell Assoc., Osceola)
Hinks (The Observatory, Cambridge)
Hirayama, Shin (University of Tokyo)
Hirsch, William (American Steel and Wire Co.)
Folder 29 Histaling, S.
Hobe, A. (Lick)
Holden, E.S. (West Point Military Academy)
Holder, F. (University of Pittsburgh)
Holland, W.
Hollis, H.P. (Royal Observatory)
Holmes, George S. (First Methodist Episcopal Church)
N. Holmes and Sons
Holmes, Rachel
Holmes, Samuel
Folder 30 Hood, W.K. (Duquesne Fireproofing Co.)
Hoogewerff, J.A. (US Naval Observatory)
Hopkins, L.S. (Kent State)
Hopkins, M.M. (Smith College Observatory)
Hough, S.S. (Royal Obs., Cape of Good Hope)
Howard, F.B. (U.S. Naval Observatory)

Box 17e
Folder 1 Hudson, Charles J. (Amherst College Observatory)
Humphreys, W.J. (U.S. Weather Bureau Office)
Hundred (American Assoc. for Advancement of Science)
Huntington (Wells- Fargo Co.)
Folder 2 Hussey, W.J. (Detroit Observatory)
Folder 3 Hutchinson, C.F. (National Research Council)
Hutchinson, Robert
Ihinohe, Naozo (Tokyo Astronomical Observatory)
Ihlsenj, M.C. (Blairsville College)
Imperial Academy of Sciences of St. Petersburg
Innes, R.T.A. (Transvaal Observatory)
Folder 4 ION - Journal of Electronics, Astomistics, Ionology, Radioactivity and Baumchemistry
Royal Instituto Idrografic
Italian Association for the Advancement of Science
Jacob and Valentin
Jacobs, I.W. (Northwestern mutual Life Insurance)
Jacoby, Harold (Columbia University)
Folder 5 Jay, Alfred H. (Syrian Protestant College Observatory)
Jayne, J.L. (U.S. Naval Observatory)
Jeffery Manufacturing Co.
Folder 6 Jennings, F.R.
Jeulsius, Louise F.
H.W. Johns-Manville Co.
Johnson, Anthony (Reed and Witting)
Johnston and Co.
Jonckhure, Robert
Jones (Dept. of Commerce)
Folder 7 Jordan, F.C. (Yerkes Observatory)
Jursek, Carl C.
Folder 8 Kaeurpffert
Kapteyn, J.C. (Mt. Wilson Solar Observatory)
Kauffman Bros.
Folder 9 Kayser
Keating, W.A.
Keeler, James
Keen, W.W. (Philosophical Society)
Kehro, John
Kellogg, Fred (Allegheny Co. Light Co.)
Kennedy, J.E.
Folder 10 Keppel, T.P. (Columbia)
Kester, F.E. (University of Pittsburgh)
Ketchuny, George (University of Pittsburgh)
Keyser, C.J. (Columbia University)
King (Dominion Observatory, Harvard College Observatory)
Folder 11 Kistler, R.L.
Kistner, Mark (St. Vincent College)
Klages, G.W.
Kloh, Skar. (University of Pittsburgh)
Klotz (Dept. of Interior)
Knopf, Otto (Sternwarte)
L.E. Knott Apparatus co.
Folder 12 Knowles, Harry
Kobold, Hermann (Astronomische Nichrichten)
Kobow, Hermann
Koch, S. Marie (St. John's General Hospital)
Konkoly, Nicolas (Royal Institute of Meteorology, Budapest, Hungary)
Koon, E. (Observatory, Potsdam)
Kopf, M.G. (Ralko Products Co.)
Folder 13 Kratzer and Co., 1904-1906
Folder 14 Kratzer and Co., June 1907
Folder 15 Kratzer and Co., July-December 1907
Folder 16 Kucera, Otto (Observatory, Zagreb, Croatia)
Kurtz, Langvein and Swartz
Kustner, F. (Sternwarte)
Laekyn, William (Solar Physics Observatory, London)
Lambert, R.C. (Carnegie Steel)
Lampland, C.O. (Lowell Observatory)
Folder 17 Langley, S.P. (Smithsonian Institute)
Lau, H.E. (Sternwarte)
Lauder, George
Laves, Kurt
Lawrence Paint Store
Leavenworth, F.P. (University of Minnesota)
Lecointe, G. (Royal Observatory of Belgium)
Folder 18 Lee, Oliver J. (Yerkes Observatory)
Folder 19 Leete, John B. (Carnegie Technical Schools)
Lefras, Gustave
LeGoullon, P.
Leisser, B. (Pittsburgh School of Design)
Leland, O.M. (Astronomical Society)
Leni, John F.
Leon, Luis (Society of Astronomy, Mexico)
Leonard, F.C. (Leonard Observatory)
Folder 20 Leuchan, H. (Sydney Observatory)
Leuschner, Armin O. (University of California)
Folder 21 Lewellyn, C. G.
Libert, Lucien
Library Bureau
Lick Observatory
Liedki, Richard
Lincoln, Paul M.
Ling, George (Columbia University)
Folder 22 Linhart, S.B. (Western University of Pittsburgh - Office of Secretary)
Folder 23 Little, Frank B. (U.S. Naval Observatory)
Lockhart, James
Folder 24 Lockwood, W. H. (S.F. Bowser Co.)
Lohse (Observatory Astrophysikalisches, Potsdam)
Long, W.F.
Longmans, Green and Co.
Lord, H.G. (Emerson McMillin Observatory, Ohio State)
Folder 25 Lovett, Edgar Odell (Princeton Observatory)
Lowell, Percival (Lowell Observatory, Arizona)
Ludendorff (Observatory Astrophysikalisches, Potsdam)
Ludwig, W.H.
Folder 26 Lumiere N. (America Co., Ltd.)
Lundin, C.A.P. (Alvin Clark and Sons Corp.)
Lunt, J.
Luterancik, John P. (St. Vincent's Seminary)
Lyon, J.L.
Folder 27 van Maanen, Adrian (Yerkes Observatory)
Folder 28 MacFarlane, James R. (Carnegie Museum)
MacMillan Co.
Maddille, James (International Latitude Observatory)
Magill, Endora
Magnus, Nyren
Magvar Tudomanyos Akadimia (Budapest)
Folder 29 Mamaux Sons
Manhattan Electrical Supp.
Mann, Ira A.
Marcus, Alexander (College of the City of New York)
Folder 30 Mars (a poem)
Marsh, Charles E. (Atchinson, Topeka,Santa Fe Railway)
Marshall Bros.
Marshall, R. (U.S. Geological Survey)
Marti, C.
Glenn L. Martin Co.
Martin, H.S. (War Dept)
Martin, John F., Rev.
Martin, William C. (John A. Brashear Co.)
Folder 31 Marwick, E.E., Col.
Marzolo, P.
Mason, H.D.
Mason, William A. (Philadelphia Board of Education)
Folder 32 Maunder, Thomas F. (British Astronomical Association)
Maury, J.W. Draper (Harvard Club of N.Y.)
May, Gertrude B.
The May Lumber Co.
Mazelle (Maritime Observatorium)
McAllister (Electric Service Supplies Co.)
Folder 33 McAteer, Charles (Harvard Observatory)
McCasland, May
Oliver McCLintock Co.
McConway, William

Box 17f
Folder 1 McCormick, S.B. (Western University of Pennsylvania), 1905-1909
Folder 2 McCormick, S.B. (Western University of Pennsylvania), 1912
Folder 3 McCormick, S.B. (Western University of Pennsylvania), 1913-1915
Folder 4 McCormick, S.B. (Western University of Pennsylvania), 1916-1919
Folder 5 McCoutrey (Boggs Buhl)
McDiarmid, R.J. (Dept. of Interior)
Folder 6 McDowell, J.B.
McDowell (J.A. Brashear Co.), 1905-1911
Folder 7 McDowell (J.A. Brashear Co.), 1912-1920
Folder 8 McGahan (Westinghouse)
McGee, Anita A.
McGill, M.A. (U.P. Theological Seminary)
McGuiness (American Warming and Ventilating Co.)
McKinley, A.E.
McKnight, T.H.B. (University of Pittsburgh)
Folder 9 McLane, R.
McLean, Maggie
McMaster, Jessie
McNaugher, John (Pittsburgh Theological Seminary)
McNees (Geologic and Topographic Survey)
McNish, Thomas
Folder 10 McPherson, William D. (The American Astronomer)
McWilliams, S.E.
Meals, Emma
Mecklin, J.M. (University of Pittsburgh)
Folder 11 Mees, C.E.K. (Eastman Kodak), 1914-1915
Folder 12 Mees, C.E.K. (Eastman Kodak), 1916-1917
Meese, L.H.
Folder 13 Meggers, W.F. (Dept. of Commerce)
Folder 14 Mendenhall, C.E. (National Research Council, Library Bureau)
Meikle, Anna E. (Case School of Applied Medicine)
Mellon, Rachel H.
Mellor, Lewis L. (Detroit Observatory)
Merrill, Paul W. (U.S. Bureau of Standards)
Mershon, Ralph
Mesta Machine Co.
Metcalf, Joel (Winchester Unitarian Society)
Meteorological Observatory of the Imperial University
Folder 15 Miles, J. Walter (Westinghouse)
Millas, Jose Carlos (National Observatory - Cuba)
Miller, G.
Miller, G.A. (University of Illinois)
Folder 16 Miller, John A. (Swarthnore College), 1906-1912
Folder 17 Miller, John A. (Swarthnore College), 1913-1914
Folder 18 Miller, John A. (Swarthnore College), 1915-1916
Folder 19 Miller, John A. (Swarthnore College), 1917-1919
Folder 20 Millikan (National Research Council)
The Millionaire
Mitchell, S.A., 1908-1914
Folder 21 Mitchell, S.A., 1915
Folder 22 Mitchell, S.A., 1916-1917
Folder 23 Mitchell, S.A., 1918-1920
Folder 24 Mitchell, S.A., 1906
Folder 25 Mitchel, Walter M. (Haverford College Observatory)
Folder 26 Moeller, Herman (J.M. Gusky Orphanage and Home)
Monk, George S. (Yerkes Observatory)
Society of the Observatory of Mont Blanc
Moore, H.K.
Morning, Ober (Pottstown High School)
Morecroft, J. Arnold (Pratt Institute)
Morgan, H.R. (U.S. Naval Observatory)
Morris, Brown Co.
Morrison, George (United Engineering and Foundry Co.)
Morschhauser, W.A.
Moseley, E.L.
Folder 27 Moulton, F.R. (University of Chicago)
Folder 28 Mourashkinsky, Basil
Oscar Muller Co.
Murdoch, Kerr Co.
Mutte, Henry
National Astronomical Observatory (Tacubaya, Mexico)
Naegauirala, R.D.
Nail, Mary C.
National Academy of Sciences
National Press Bureau
Folder 29 National Radiator Co.
National Research Council
Nature Magazine
U.S. Naval Observatory
Folder 30 Neodymium
Folder 31 Neodymium

Box 17g
Folder 1 Nernst Lamp Co.
Newall, H.F. (Solar Physics Observatory, Cambridge)
Newcomb, S.
Folder 2 New Era Printing Co., 1907-1908
Folder 3 New Era Printing Co., 1909
Folder 4 New Era Printing Co., 1910
Folder 5 New Era Printing Co., 1915-1917
Folder 6 New Era Printing Co., 1919-1920
Folder 7 New Hampshire State Library
New York Public Library
Observatory of Nice
Nicholson Printing co.
Nicola, F.T. (Schenley Farms Co.)
Northwestern University
Nutting, P.G. (Westinghouse)
Nyland, A.A. (Observatory of Utrecht)
Folder 8 Observatory Committee
Oliver, George F. (U.S. Senate)
Olivier (University of Virginia)
One Hundred
Optical Instrument Monthly
Otis Elevator Co.
Folder 9 Ott, F.L.
The Pacific Express Co.
Paddock, G.F. (Mills Observatory Expedition)
Painter, George E.
Palmer, Charles
Palmer, Harry M.
Palmer, Margaretta
Folder 10-14 Pi Co-op (Parallax Committee)
Folder 15 Park, J.A.
Park, J.L. (Western University of Pennsylvania)
Parker, M.H. (Dept. of Interior)
Parker, F.H. (Dept. of Interior)
Folder 16 Parkhurst, Henry (Superior Court)
Parkhurst, J.A. (Yerkes Observatory)
Folder 17 Pastorelli and Rapkin, Ltd.
Patterson, W.H. (Westinghouse)
Paulson, W.S.
Payne, William W. (Goodsell Observatory of Carleton College)
Pearl, Raymond (National Research Council)
Folder 18 Peck, Henry A. (Syracuse University)
Peyram, George B. (Columbia University)
Peifer, Charles J. (J.A. Brashear Co.)
Pennsylvania Railroad Co.
Pennywitt, Henry (Dept. of Agriculture)
Folder 19 Perrine, C. (Astronomical Observatory - Argentina)
Folder 20 Pessler, A.
Petersen, Max (University of Wisconsin)
Pfund, A.H. (Johns Hopkins University)
Folder 21 Phillips, Fracis (University of Pittsburgh)
Phillips, Theodore
Photographic Astronomy
Folder 22-30 Pickering, E. (1900-1911,1912-1917) (Harvard College Observatory)
Pickering, W. (Harvard College Observatory)
Folder 31 Pickering, W. (Harvard College Observatory)
Pierpont, James
Pellou, J.L. (Dept. of Public Works)
Pillsbury, J.L. (National Geographic Society)
Folder 32 Pitman (Swarthmore College)
Pittsburgh and Allegheny Telephone Co.
Pittsburgh Calcium Light and Film Co.
Pittsburgh Electrical and Machine Works
Pittsburgh Fire Extinguisher Co.
Pittsburgh Heating Co.
Pittsburgh Iron and Wire Works
Pittsburgh Map
Pittsburgh Printing Co.
Folder 33 Plaskett, J.S. (Dominion Observatory, Victoria, South Carolina), 1907-1910
Folder 34 Plaskett, J.S. (Dominion Observatory, Victoria, South Carolina), 1911-1912
Folder 35 Plaskett, J.S. (Dominion Observatory, Victoria, South Carolina), 1913-1914

Box 17h
Folder 1 Plaskett, J.S. (Dominion Observatory, Victoria, South Carolina), 1915-1917
Folder 2 Plaskett, J.S. (Dominion Observatory, Victoria, South Carolina), 1919
Folder 3 Plassman, J.
Polar Trails
Poole, D. Lewis (Royal Societies Club)
Poor, Charles (New York Academy of Sciences)
Poor, John (Shattuck Observatory)
Popular Astronomy
Folder 4 Porter, Edwin K. (City Deposit Bank)
Porter, H.B. (The Scientific Shop)
Porter, H.K.
Porter, Jermaine G. (Cincinnati Observatory)
Postal Telegraph Cable Co.
Post Master
Pratt, W.H.
Folder 5 Price, P.W. (County Engineers Office)
Priest, Mame S. (U.S. Bureau of Standards)
Presho, C. (Caton Technical Schools)
Pritchett (Carnegie Foundation)
Folder 6-7 Proof
Folder 8 Purdy, Ross
Quimby, Alden
Le Radium (Physics Journal)
Ralko Products Co.
Rambaut, Arthur A. (Radcliffe Observatory)
Ramsey, Charles N. (Equitable Life Assurance Society of the U.S.)
Folder 9 Rasner and Dinger Co.
Rayburn and Bates
Raynaud, Michel
Rea, James H.
Director (Real Observatory)
Red Cross
Folder 10 Redden, J.M.
Reed and Witting - Stationers
Reich, M. (General Engineering and Contracting Co.)
Reiche, Louise
Reid, A.M.
Reimer, George (Verlagsbuchhandlung)
Folder 11 Reiss, R.
Remsen, Ira (Johns Hopkins University)
Folder 12 National Research Council
Folder 13 Ricco, A. (Royal Observatory of Catania)
Rich, J. and G.
Ridgeway, Frank (U.S. Dept. of Agriculture)
Folder 14-15 Riefler, Clemens (Weather Bureau)
Folder 16 Rifenburg, F.C. (Phila. Typewriter Supply Co.)
Riggenbach, Albert (Astronomisch - Meterorlogische Anstalt)
Rines, David (Coast and Geodetic Survey)
Folder 17 Ristenpart, F. (Astrological Observatory Casilla)
Ritchey, G.W. (Solar Observatory, Mt. Wilson, CA)
Ritter and Flebbe
Robertson, David (Pittsburgh Golf Club)
Rockwell, W.W.
Roddi, Auguste
Roe, E.D. (Syracuse University)
Romeiki Inc.
Rosedale Foundry and Machine Co.
Folder 18 Ross, Frank (International Geodetic Assoc.), 1907-1909
Folder 19 Ross, Frank (International Geodetic Assoc.), 1910
Folder 20 Ross, Frank (International Geodetic Assoc.), 1911-1913
Folder 21 Rowland, K. (Western University of Pennsylvania)
Royal Typewriter Co.
Royal Astronomical Society, London
Royal Observatory, London
Rumrill, H.B. (Pennsylvania Railroad)
Folder 22 Russell,Henry Norris (Princeton),
Folder 23 Russell,Henry Norris (Princeton), 1911
Folder 24 Russell,Henry Norris (Princeton), 1912
Folder 25 Russell,Henry Norris (Princeton), 1913
Folder 26 Russell,Henry Norris (Princeton), 1914
Folder 27 Rust, Frances
Sabisee, Wallace (War Dept.)
Sanford, Fernando (Stanford University)
Sayer, Luella (Dearborn Observatory)
Saylor, E.B. (Western Union Telegraph Co.)
Scaife, Lucien
Folder 28 Scandrett, Thomas (Dept. of Public Safety)
Schapper, H.
Scheiner, J.
Schiaparelli, Giovanni (Observatory of Brera-Milan)
Schimmack, P.K.
Schlesinger, Frank (Publications list)
Schoenberg, E.
Schoenlein, O.G. (Emmanuel Lutheran Church)
Scholer, Eva
Schoer, Richard (Sternwarte - Hamburg)
Folder 29 Schott Genossen - Jena, Germany
Schoyer, A.M. (Pennsylvania Lines)
Schrocter, F.H. (Christiana Observatory - Norway)
Schumacher, Elsa
Folder 30 Schuster, Arthur (Manchester, England)
Schwab, J.C. (Yale University Library)
Schwarzchild, R. (Astrophysikalisches Observatory)
Folder 31 Schwob, Adolphe, Inc.
The Science Press
Scientific American Compiling Dept.
Scientific Materials Co.
Scott, Charles (Westinghouse)
Seares, F.H. (Solar Observatory)
Seckendorff, M.G.
Folder 32 Secretary's Office (University of Pittsburgh), 1910-1914
Folder 33 Secretary's Office (University of Pittsburgh), 1915-1919
Folder 34 See, F.J.J. (Naval Observatory)
Folder 35 Seed, Dry Plate Co.
Seelinger, H. (Sternwarte - Munchen)
Seibel, George (Pittsburgh Gazette)
Shapley, Harlow (University Observatory - Princeton
Folder 36 Sharman, George H.
Shattuck (8th International Geographic Congress)
Shinjo, Shinto
Sidgreuves, Walter (Stonyhurst College)
Sies, R.F. (School of Education, University of Pittsburgh)
Simmons, Guy (Independent Agency, Bureau of Statistics)
Singer, G. Harton

Box 17i
Folder 1 Slipher, V.M. (Lowell Observatory, Flagstaff, Arizona)
Folder 2 Slocum, Frederick (Yerkes), 1909-1914
Folder 3 Slocum, Frederick (Yerkes), 1915-1919
Folder 4 Smalley, R.E.
Smiley, Charles (Allegheny Post Office)
Smith, A.G.
Smith, Charles (Fire Insurance)
Smith Edwin (Dept. of Commerce and Labor, Coase Geodetic Survey)
Smith, Elliott (Cincinnati Observatory)
Smith, J.M.
Smith, Mason F. (Yale University)
Smith, S.B. (Prism Glass Co.)
Smith, Walter
Folder 5 Smithsonian Institution
Folder 6 Snow, Benjamin W. (University of Wisconsin)
Snyder, Antes (Pennsylvania Railroad)
Snyder, M.B. (Philadelphia Observatory)
La Societe Imperiale des Naturalistes de Moscow
Folder 7 Solar Rotation
Solyom, Herbert (Yerkes Observatory)
Somers, Fitler and Todd Co.
Southall, James P.C. (Alabama Polytechnic Institute)
Folder 8 Spencer Lens Co.
Spieth, William Spindler and Hoyer
Spurgeon, John J. (Public Ledger)
Standard Roller Bearing Co.
Folder 9 Standards-U.S. Bureau of
Folder 10 Stauernagel, Oscar
Stebbins, Joel (University of Illinois)
Folder 11 Stechert, G.E. Co.
Stellar Parallax
Stellar Spectra
Folder 12 Hamburger Sternwarte
Stetson, H.F. (Yerkes)
B.F. Stevens and Brown - Trafalgar Square
Stevens, Robert L. (Trinity Rectory)
Stevenson, Edward A.
Stevenson and Foster Co., Pittsburgh
Folder 13 Stewart, De Lisle
Stewart Douglas (Carnegie Museum)
Stewart, Marie
Stewart R. (Western University)
Stewart R. Mildrum (Dominion Observatory)
Stocker, Florence J. (Radcliffe College)
Stockhausen and Sons
Folder 14 Stone, Ormond (University of Virginia)
Stratton, F.J. M. (Solar Physics Observatory - Cambridge University)
Straub, Max V.
Folder 15 Stroingren (Observatory Copenhagen)
Stroobant, P. (Royal Observatory of Belgium)
Struve, D.H. (Sternwarte Konigliche)
Staub, John
John Stulen and Sons
Folder 16 Stupakoff, S.H.
Supplee, C.W.
Sutton, Psyche Rebecca (The Daily Reporter)
Swope, E.F. (William Mitchell Printing Co.)
System, Fitting Co.
Tacchini, Pietro
Taggart and Yerxa
Folder 17 Tallock, John (Wall Street)
Taylor (University of Cincinnati)
Taylor and Dean (Pittsburgh Iron and Wire Works)
Taylor, James (Vassar)
Tebbcott, John (Observatory-Wales)
Technical World Magazine
Teller, Sidney (Irene Kaufmann Settlement)
Templeton, Alex
Terschoffel, A. (Institute of France)
Tetens, Otto
Folder 18 Thaw, Benjamin
Thaw, H.K.
Folder 19-22 Thaw, Stephen Dows
Folder 23 Thiersky, G.W. (Carnegie Institute of Technology)
Thomson, Andrew
A.F. Thompson and Co., Boston, MA
Thompson, Henry S. (Harvard)
Thompson, Mary
Thompson, Mrs. William R.
Folder 24 Thurston Prep School
Tickel (University of Pittsburgh)
Tillyer, Edgar D. (U.S. Bureau of Standards)
Folder 25 Tittmann, O.H. (Coast and Geodetic Survey)
Folder 26 Todd, D. (Amherst College Observatory)
Folder 27 Todd, James (Sterling Varnish Co.), 1911
Folder 28 Todd, James (Sterling Varnish Co.), 1912
Folder 29 Todd, James (Sterling Varnish Co.), 1913
Folder 30 Tombo, Rudolf, Jr. (Alumni Council of Columbia University)
Toulouse, Univ. de
Townley, Sidney D. (Stanford University)
Folder 31 Tozer, R.S.
Tracht (University of Chicago)
Trinks, W. (Carnegie Technical School)
Trubner, Karl J.
Truman, O.H. (University of Iowa)
Folder 32 Trumpler, R.
Folder 33 Tucker, R. H. (Lick Observatory)
Turk, J.C. (A. S. Wilson Co.)
Turner, Arthur B. (college of the City of New York)
Turner, Flora
Turner, H.H. (University Observatory - Oxford, England)
Folder 34 Tyler (Ensign Manufacturing Co.)
Tyson (University of Pittsburgh)
Ukiah Observatory
Ullman, B.L. (University of Pittsburgh)
Folder 35 Union (International Astronomical Union)

Box 17j
Folder 1 Union National Bank
Union Observatory (Johannesburg)
United Presbyterian
United Press Service
United States Express Co.
University of Chicago (Library)
University of Chicago Press
University of Michigan (Library)
Folder 2 University of Pittsburgh
Folder 3 University Professors, American Assn. Of
Updegraff, Milton (U.S. Naval Observatory)
Vahlen (Preussische Akademie)
Valente, John
Vallot, J. (Observatory of Mont Blanc)
Van Bresbroeck G. (Yerkes)
Very, Frank (Westwood Astrophysical Observatory)
Voigtlander and Son (Optical Works)
Folder 4 Voss Sortiment
Voorhees, Oscar
Voute, J. (Royal Observatory)
Walcott, C.D. (Smithsonian)
Wales Visible Adding and Listing Machine
Walker, A. (U.S. Naval Observatory)
Folder 5 Walker, C.H. (Editor of Ion)
Walker, Gilbert F. (Indian Observatory - Calcutta)
Walker, H.L. (Dollar Savings Bank)
Walkey, O.R.
Wallace, Daniel H.
Folder 6 Wallace, Isabel
Wallace, John Wallace, R. James (Yerkes)
Wallin, Sven
Walter, G.
Waltham Watch Co.
War Dept.
War Dept. (Office of Chief Signal Officer)
Folder 7-11 Ware, Louise (Yerkes)
Folder 12-14 Warner and Swasey Co.
Folder 15 Weimck
Welch, Willia Y. (Clarion State Normal School)
Weld, Le Roy (Coe College)
Wells Fargo and Co.
Wendell, O.C. (Harvard College Observatory)
Wenley, R.M. (University of Michigan)
West, Andrew (Princeton)
West, Laura
Western Union Telegraph
Westinghouse, Church, Kerr and Co.
Folder 16-19 Westinghouse Electric and Manufacturing Co.
Folder 20 Westinghouse Machine Co.
Wehterbee, Weston
Wettach, James
White, Arthur
White, James F. (Publishers)
White, Jesse (University of Pittsburgh)
White, Scott A.
White, William Charles (University of Pittsburgh)
Folder 21 Whitney, Mary
Whitney, W.R.
Whittmer, Clara
Whyte, Charles (United Free Church)
Wicks, Mark (Thorton Heath)
Folder 22 Wilkins, Mary
Willard, Elisa (Carnegie Library)
Willard, Storage Battery Co.
Williamson, Robert (Madison Wisconsin)
Wilsing, F.
Folder 23 Wilson, D.J. (Case School of Applied Science)
Wilson, E.B. (National Academy of Sciences)
Wilson, Herbert C. (Carleton College)
H.W. Wilson Co.
Wilson, Ralph (Goodsell Observatory - Carleton College)
Folder 24 Windsor, William
Winters, Edna (Indiana Normal School)
Wirth, Andrew G.
Witmer, Samuel
Wittig, Gustav (University of Alabama)
Folder 25 Wolf, Max
Womer, P.P.(Washburn College)
Wood, Harry O. (National Research Council)
Wood, R.W. (Johns Hopkins University)
Woods, Harry I. (Washburn College)
Folder 26 Woodward, R.S. (Carnegie Institute of Washington)
Folder 27 Woodwell, Joseph F.
Worth, S.D. (Dept. of Commerce and Labor)
Wrightson, E.H. (Allegheny Loan and Trust Co.)
Folder 28 Yale University
Young, Anne (Mt. Holyoke College)
Young, Charles Augustus (Princeton)
Folder 29 Young, R.K. (Dept. of Interior)
Young, S. Edward (Second Presbyterian Church)
Folder 30 Ziss, Carl
Zenith Stove and Heater Co.
Zenthess, H.G. (Videnskabernes Selskab)
Observatory of Zi-Ka-wes
Zwillinger, Max (Crown Optical Co.)

Section: Addendum - Personal Correspondence

Box 17j
Folder 31 Aitken, Robert G. (Lick Observatory, Hamilton, CA), September 6, 1901; June 5, 1902
Albrecht, Theodore, January 4, 1900
Arnand, Joseph J. (New York), March 26, 1900; March 24, 1901
Barnard, Edward E. (Yerkes Observatory), April 16, 1900; February 14, 1901
Barrett, S.B. (Yerkes Observatory), January 13, 1903-March 31, 1903
Bauer, George N. (New York), January 4, 1900
Burkhalter, Charles (Cabot Observatory), March 17, 1900
Folder 32 Campbell, William W. (Lick Observatory), August 21, 1900-March 11, 1903
Chase, F.L. (Boulder, CO), June 16, 1903; June 22, 1903
Chester, C.W. (Naval Observatory), April 3, 1903
Davis, Herman (Gaithersburg, MD), February 11, 1900-January 3, 1903
Davroton E. (San Francisco), March 13, 1900; March 20, 1900
Folder 33 Edwards, Frank V. (US Coast and Geodetic Survey), May 2, 1900; November 7, 1900
Ehrenberg, Frederick (New York), June 27, 1900
Ellerman, Ferdinand (Yerkes Observatory, Williams Bay, WI), March 13, 1900; March 20, 1900
Gildein, Otto von (San Francisco), April 3, 1900-July 5, 1900
Folder 34 Hale, George E. (Yerkes Observatory), July 17, 1899-Ocotber 18, 1901
Hartman, T. (Artrophys Observatory, Postsdam), March 19, 1900
Hinks, Arthur (The Observatory, Cambridge), June 17, 1903
Folder 35 Jacoby, Harold (Astronomical Observatory, Columbia University, New York), January 24, 1900-December 9, 1901
Jesse, R.H. (University of the State of Missouri, Columbia, MO), April 26, 1901
Jordon, David S. (Lelaw Stanford Junior University, Stanford University, CA), December 7, 1901
Kreatr, H. (Keil, Germany), September 15, 1901

Box 18
Folder 1 Leuschner, Armin O. (Students Observatory, University of California), March 16, 1900-November 17, 1900
Liebisch, B. (Leipzig, Germany), August 21, 1900
Murdock Press (San Francisco), June 6, 1901
Parkherst, John A. (Marengo, IL), December 1, 1899-July 4, 1900
Phipps, S.C. (Berkley, CA), April 1, 1900-May 27, 1900
Pritchett, Henry Smith (Massachusetts Institute of Technology), March 13, 1900-April 23, 1901
Porter, J.S. (Cincinnati Observatory), June 8, 1900
Preston, E.D. (Washington, DC), March 14, 1900
Folder 2 Rees, J.K. (New York), December 1, 1899-April 7, 1903
Ritchey, Alfeda (Lake Geneva, WI), December 27, 1901
Rogers, A.O. (San Francisco), November 27, 1900
Folder 3 Smith, Edwin (US Coast and Geodetic Survey, Washington), January 15, 1900-May 23, 1901
Trel, T.R. (Astronomical Society of the Pacific, San Francisco), February 14, 1901-October 26, 1901
Folder 4 Townley, Sidney D. (Astronomical Society of the Pacific, Berkley, CA), January 1, 1900-July 6, 1906
Treasury Department, Office of the Coast and Geodetic Survey, Washington, DC, June 4, 1901
Tucker, R.H. (Lick Observatory), January 30, 1900
Twitchell, Edward W., January 31, 1900-September 1, 1900
U.S. Naval Observatory, Washington, DC, May 9, 1901
Wanach, B. (Postscharn, Germany), June 29, 1900
Wilczynski, E.J. (Berkley, CA), May 23, 1900-August 11, 1900
Williamson, E.B. (Bluffton, Indiana), April 6, 1900
Woodward, R.S. (Columbia University), May 20, 1901

Section: Personal Correspondence to Schlesinger

Box 18
Folder 5 Camerer, Emile (New York), July 23, 1901
Davis, Herman (Washington, DC), July 7, 1900; May 1, 1901
Flessner, Herman (New York), March 8, 1900
Frank, Rose (New York), April 11, 1900; May 30, 1900
Horpham, Flora E. (New York), February 9, 1900-March 31, 1902
Hirsch, Mabelle, February 8, 1900
Folder 6 Jones, Cecil K. (Fowler, CA), May 15, 1900
Kanser, Edwar (Germany), December 5, 1899; March 30 1901
Ling, George H. (Wesleyan University, Middletown, CT), November 5, 1900-September 22, 1901
Folder 7 McAdie, Alexander (U.S. Weather Bureau, San Francisco), May 16, 1901
Miller, C.W. (San Francisco), January 30, 1900-January 26, 1901
Mitchell, S.A., March 10, 1901-August 2, 1901
Nesbitt, Scott (Washington, DC), May 8, 1901
Pritchett, Henry S. (Massachusetts Institute of Technology), May 2, 1901
Folder 8 Ritchey, Elfreda L. (Williams Bay, WI), June 12, 1899-May 2, 1901
Rogers, A.O. (San Francisco), January 11, 1900-March 13, 1901
Sayuer, Mrs. J. V. (Williams Bay, WI), March 19, 1903
Folder 9 Schlesinger, Emanuel and Alice, October 23, 1900-June 16, 1903
Schlesinger, Gus, Arnelia, Gaby and Mignon (New York), May 4, 1900-December 1, 1901
Schlesinger, Joe (New York), March 26, 1901
Schlesinger, Minnie (New York), June 5, 1903
? (U.S. Naval Observatory), September 29, 1900
? (Observatorie Astronomique G. Metérologique, Lyon, France), March 13, 1901

Section: Personal Correspondence from Schlesinger

Box 18
Folder 10 Kirkpatrick, J. B. (New Brunswick, NJ), November 10, 1900
Schlesinger, Minnie. (New York), October 19, 1899

Section: Personal Correspondence to Eva Schlesinger and Frank Jr.

Box 18
Folder 11 Davis, Coreita R. (Washington, DC), July 10, 1900
Davis, Helen L (Columbia University, New York), c. 1901
Harpham, Flora E. (New York), April 30, 1901
Hirsch, B.S. [Eva's father], March 13,1900
Kayuk, S., April 8, 1901
Kelton, Genevieve (Ventura, CA), with enclosure to Frank Jr. April 9, 1901
? [Eva's Grandfather], April 14, 1901
? Sue., April 15, 1901

Subseries 7. Heber D. Curtis, 1916-1930

Scope and Content Notes:

Heber D. Curtis was Director from 1920-1930. His field of interest was solar eclipses and stellar spectroscopy. He took part in eleven eclipse expeditions, five while he was Director of Allegheny Observatory. Talented in the construction and operation of scientific instruments, he built a machine shop as well as precision instruments. Dr. Curtis left in 1930 to become Director of Observatories of the University of Michigan.

Box 18
Folder 417 Ac-Am
Folder 418-419 Ait
Folder 420 Alb-Alt
Folder 421 Alu-American Association
Folder 422 American Association F
Folder 423 American Association of American Re
Folder 424-426 American, Re
Folder 427 American, Ro-Astron
Folder 428 Astrop-Bab
Folder 429-433 Bac
Folder 434 Bai-Ban
Folder 435 Bar

Box 19
Folder 436-440 Bau-Beal
Folder 441 Bras-Bri
Folder 442 Bro-Bry
Folder 443 Buf-Bury
Folder 444 Burn
Folder 445 Burt-Campbell, J
Folder 446-449 Campbell, W
Folder 450 Car
Folder 451 Cha
Folder 452 Chi-Coa
Folder 453 Col-Com
Folder 454 Con-Cox
Folder 455 Cr-Cur
Folder 456 Cut-Din
Folder 457 Cir-Dodd
Folder 458 Dodw
Folder 459 Dol
Folder 460 Dom-Dr
Folder 461 Du
Folder 462 Ea
Folder 463 Ec
Folder 464 Ed-Em
Folder 465 En-Fa
Folder 466 Fe-Fox, M
Folder 467 Fox, P
Folder 468 Fra
Folder 469 Fre-Fu

Box 20
Folder 470 Ga
Folder 471 Gi-Go
Folder 472 Gr
Folder 473 Hah-Ham
Folder 474 Har-Has
Folder 475 Hau-Hef
Folder 476 Hei-Hen
Folder 477 Hi-Ho
Folder 478 Hu
Folder 479 Hy
Folder 480-484 Intel
Folder 485 Io-Jar
Folder 486 Jaf-Ju
Folder 487 Ka-Ki
Folder 488 Ki-Kn
Folder 489 Ko-La
Folder 490 Le
Folder 491 Lib-Lin
Folder 492 Lio-Ll
Folder 493 Lo-Lu
Folder 494 McA-McDon
Folder 495-496 McDow
Folder 497 McF-Mac
Folder 498 Marr
Folder 499 Mars-Mart
Folder 500 Mas-Meg

Box 21
Folder 501 Meh-Merria
Folder 502 Merril-Mie
Folder 503-516 Mil
Folder 517 Min-Mit
Folder 518-519 Mit
Folder 520 Mon-Moo
Folder 521 Mor-Nac
Folder 522 National, Ac
Folder 523 National, AS-National, S
Folder 524 Natu-New
Folder 525 New, E

Box 22
Folder 526 New, E
Folder 527 New, K-O'd
Folder 528 Og-Ou
Folder 529 Pa
Folder 530 Pe
Folder 531 Ph-Pitt
Folder 532 Pittsburgh
Folder 533 Pl-Poo
Folder 534 Poo
Folder 535 Pop
Folder 536 Por-Pu
Folder 537 Ra-Re
Folder 538 Ri-Rod
Folder 539 Rot
Folder 540 Roy-Ru
Folder 541 Sa-Sch
Folder 542-550 Schl

Box 23
Folder 551-556 Schl
Folder 557 Science
Folder 558 Scient
Folder 559 Sch-Shan
Folder 560-561 Shap
Folder 562 She-Si
Folder 563 Sli
Folder 564 Slo-Su
Folder 565 So-Steb
Folder 566 Stec-Steu
Folder 567 Sto
Folder 568 Stra
Folder 569 Stre
Folder 570 Sw
Folder 571 Sy-Te
Folder 572-574 Tha
Folder 575 Th-Thi

Box 24
Folder 576 Tho-Tr
Folder 577 Tu-United, P
Folder 578 U.S., B-U.S., C
Folder 579 U.S., G-U.S., N
Folder 580 U.S., R-Van, M
Folder 581 Van, R
Folder 582 Vas-Ve
Folder 583 Vo-Ward
Folder 584 Warn-Weste
Folder 585 Westi
Folder 586 Wh-Wra
Folder 587-589 Wri
Folder 590 Ya-Yr
Folder 591 Yw-Yu
Folder 592 University of Pittsburgh, A-Bus
Folder 593-598 University of Pittsburgh, Bus
Folder 599 University of Pittsburgh, Bud-Cat
Folder 600 University of Pittsburgh, Cha

Box 25
Folder 601 University of Pittsburgh, Cha
Folder 602 University of Pittsburgh, Cha-Chi
Folder 603 University of Pittsburgh, D.
Folder 604 University of Pittsburgh, E-G
Folder 605 University of Pittsburgh, H-K
Folder 606 University of Pittsburgh, M-Seco
Folder 607-611 University of Pittsburgh, Secr
Folder 612 University of Pittsburgh, Si-Su
Folder 613 University of Pittsburgh, T-Z

Subseries 8. Frank C. Jordan, 1908-1941

Scope and Content Notes:

Frank Craig Jordan was Director from 1930-1941. Jordan worked with Frank Schlesinger at Yerkes and in 1908 followed him to Allegheny Observatory and continued Schlesinger's programs, including parallax methods. Dr. Jordan made outstanding contributions in the endeavor of photographic photometry of variable stars. He died in a house fire in 1941.

Folder 614 Ai-A
Folder 615 Ar-As
Folder 616 Au-B
Folder 617 Ca-Co
Folder 618 Cr-Cu
Folder 619 Do-Ea
Folder 620 Eb-Hi
Folder 621 Ho-K
Folder 622 L-Me
Folder 623 Mi-O
Folder 624 P
Folder 625 R

Box 26
Folder 626-628 Sch
Folder 629 Sh-Su
Folder 630 T-Wa
Folder 631 We-V
Folder 632 University of Pittsburgh

Section: New Material Added, 2013

Box 74
Folder 1 Jordan - Parkhurst Correspondence, 1908

Subseries 9. Nicholas E. Wagman, 1930-1970

Scope and Content Notes:

Nicholas Emory Wagman was Acting Director from 1941-1947, then Director from 1947-1970. Wagman became an astronomer at the Observatory in 1930 and became acting director in 1941 upon Dr. Jordan's death. In 1946 he announced one of the rarest finds of modern astronomy: a dark star in the constellation Ophiucus, which he named "Alpha Opiuchi C." As a result of this discovery, he was appointed Director in 1947. He investigated stellar and astrometric binaries and undertook a comprehensive program of modernization. He played a leading role in the disseminating of information on astronomy to the Pittsburgh public community. He served as lecturer at Buhl Planetarium and conducted forums at the YMCA. He was prominent as a member of the American Astronomical Society and the American Association for the Advancement of Science. He left the Allegheny Observatory in 1970.

Folder 633 Ab-Ad
Folder 634-635 All
Folder 636 All-Alp
Folder 637-640 Ama
Folder 641 American, A-American, M
Folder 642 An-Ar
Folder 643 As
Folder 644 Av-Bea
Folder 645 Ber-Bil
Folder 646 Bin
Folder 647 Bl-Bra
Folder 648 Bro
Folder 649 Bru-Buh
Folder 650 By-Cal

Box 27
Folder 651 Cam-Clu
Folder 652 Clu
Folder 653 Coh-Com
Folder 654 Coo-Cu
Folder 655 Dan
Folder 656 Dav
Folder 657 De-Do
Folder 658 Dr-Ea
Folder 659-660 Eb
Folder 661 Ed-Eu
Folder 662 Fe-Fl
Folder 663 Fo-Gan
Folder 664 Ga
Folder 665 Ge-Go
Folder 666 Gre-Gri
Folder 667 Ha-Heb
Folder 668 Hei-Her
Folder 669 Hey-Ho
Folder 670 Hu-Hy
Folder 671 I-J
Folder 672 Ka
Folder 673 Ke-Kl
Folder 674 Ko-Ku
Folder 675 La-Le

Box 28
Folder 676 Li-Lu
Folder 677 Ma-McD
Folder 678 Mc-Mrc
Folder 679 Mid-Mu
Folder 680 Mu
Folder 681 Mas-Natl
Folder 682-684 Nati
Folder 685 Natu-Ne
Folder 686 No
Folder 687 Pa-Pe
Folder 688 Pec-Pi
Folder 689 Po-Pre
Folder 690 Pri-Ra
Folder 691 Re-Ri
Folder 692 Ro
Folder 693 Sa-Scho
Folder 694 Schl-Schw
Folder 695 Schw-Shar
Folder 696 Shaw-Shi
Folder 697 Sho-Sk
Folder 698 Sm-So
Folder 699 Sp-Ste
Folder 700 Stu

Box 29
Folder 701 Str
Folder 702 Stu-Swa
Folder 703 Swe-Ta
Folder 704 Te-U
Folder 705 Vae-Van, B
Folder 706-708 Van, D
Folder 709 Van, P-Vas
Folder 710 Ve-Wa
Folder 711 Wee-Westi
Folder 712 Westo
Folder 713 Wh-Will
Folder 714 Wils
Folder 715 Win-Wu
Folder 716 Wy-Yo
Folder 717 University of Pittsburgh, B-Ch
Folder 718-721 University of Pittsburgh, Cr
Folder 722 University of Pittsburgh, H
Folder 723 University of Pittsburgh, L
Folder 724 University of Pittsburgh, O-P
Folder 725 University of Pittsburgh, V

Section: New Material Added, 2013

Box 74
Folder 2-5 Wagman Correspondence,
Folder 6 Wagman Correspondence - Other and University,

Subseries 10. Joost H. Kiewiet de Jonge, 1953-1977

Box 74
Folder 7-13 Kiewiet de Jonge Correspondence,
Folder 14-15 Kiewiet de Jonge Correspondence - University Correspondence

Series II. Letterpress Books of Directors/Acting Directors, 1862-1910

Scope and Content Notes:

As with the correspondence of the Directors/Acting Directors, the letterpress books of the Directors/Acting Directors have also been microfilmed and a detailed item listing can be found in Indexes to the Microfilmed Correspondence of Directors/Acting Directors and selected Astronomers Among the Records of the Allegheny Observatory. There are four books, however, that are not indexed in that inventory. The first, a letterpress book of F.L.O. Wadsworth, has not been microfilmed or indexed. This book is in Box 33. The remaining three in Box 34 are from Frank Schlesinger and were microfilmed separately as AIS.1981.06. Indexes appear at the end of each volume and indexes to all three Schlesinger letterpress books can be found at the beginning of reel 1 of AIS.1981.06 (Microfilm-cabinet 2, Drawer 9).

Subseries 1. Samuel Pierpont Langley, 1884-1889

Scope and Content Notes:

Samuel Pierpont Langley was the first Director of the Allegheny Observatory and held that position from 1867 to 1887. His primary interest was the sun and he began his studies of the sun immediately after assuming the post of Director. Langley prepared drawings of sun spots and associated phenomena and astronomers, today, are still familiar with Langley's classic drawing of the great sunspot of 1873.

In 1869 Langley devised and made operational the electric system of transmitting telegraphic time to several of the Pennsylvania Railroad lines which were associated with the observatory. In the area of magnetic disturbances, Langley was the first to associate such disturbances on the earth with solar outbreaks of an extremely active character.

Concerning studies in the realm of solar physics, Professor Langley was impressed with the idea that much radiant energy from the sun could not be recognized with instruments then in use, and after much experimentation, he invented the bolometer. With this instrument he succeeded in measuring the amount of heat radiation on the earth from the sun (the solar constant).

Professor Langley studied many minor though important questions concerning radiant energy. His investigations of the moon's temperature added greatly to our knowledge of the moon. Langley used his spectrobolometer to measure the highest temperature of the moon which was found to be approximately zero degrees centigrade and the lowest temperature of the moon which was found to be equivalent to the temperature of space.

Langley also collected data on the part of the solar system beyond the infra-red zone. With the aid of Professors Keeler, Very, and Page measurements were made by Langley utilizing the spectrobolometer and the galvanometer which he invented before photographic methods were develop.

Langley, of course, has received much recognition for his contributions to aeronautics. However, his original intention was not to construct a flying-machine, but instead to "determine the laws governing flight." At the Allegheny Observatory, Langley built a whirling arm on which "he tested airfoils, fusiforms and other aerodynamic objects, measuring their angels and pressures as they moved through the air at varying speeds." Studies of actual birds and "mechanical birds" ("winged contrivance" made of tin, cork, and rubber) were conducted and findings published in a paper entitled "Experiments in Aerodynamics."

Professor Langley left his post at the Allegheny Observatory in 1887 (leaving F.W. Very, his assistant, in charge) to become Assistant Secretary of the Smithsonian Institution; later, following the death of Professor Baird, he was elected Secretary of the Institution in 1891. Langley continued his research in aerodynamics and from a catapult, on May 6, 1896, launched an unmanned, steam-powered flying machine over the Potomac. It flew more than a half mile and was subsequently recovered. The first manned flight of his gasoline-powered "aerodome" failed in 1903 because of a launching device defect. Glenn Curtiss successfully piloted Langley's restored plane eight years after his death.

Note: Calendar entries covering the period 1884-1889 (Letterpress books no.'s I, II, and III) consist of abstracts of letters selected from four areas of research: 1) magnetic disturbances, 2) solar radiation, 3) mapping of infra-red spectrum, and 4) aerodynamics. There are also selected abstracts relating to both the electric time signal service and miscellaneous correspondence.

Please note that references to pagination indicate number of pages letters occupy in letterpress books and not necessarily number of pages of actual letters.

Box 30
Volume 1 Samuel Langley, 1862-1872
Volume 2 Samuel Langley, 1884-1887

This calendar, comprised of Volumes 2-3, was prepared by David Lieberman, a student in the Graduate School of Library and Information Sciences, University of Pittsburgh, as an independent study project during September - December, 1973.

1. Reed, J.R. Pittsburgh, PA Comparative bolometer measurement to determine bolometer efficiency, 2p., March 6, 1884
2. Brashear, J.A. Allegheny, PA. Has examined Brashear's lens specimens and has enclosed several items including a bolometer carriage in order that Brashear might measure from it to prepare his own, 2p., March 7, 1884
3. Grunow, William. West Point, NY. Langley waiting with great interest the result of experiment with a 1/20 mm. single strip bolometer. [Page 2 of letter not legible, Ed.], 2p., March 7, 1884
4. Grunow, William. West Point, NY. A firm in Paris wishes to secure bolometers for the purpose, Langley supposes, of constructing others, 1p., March 8, 1884
5. Thaw, William. Allegheny, PA. A discussion of the conditions which cause a rise in the surface temperature of the Earth, 1p., March 14, 1884
6. Grunow, William. Encloses a draft for $100 for payment of construction of four bolometers, 2p., March 18, 1884
7. Grunow, William. West Point, NY. Langley needs badly a 1 mm. bolometer made of 1/10 mm. strips, 2p., March 18, 1884
8. Hazen, W.B. Washington, DC. Investigations on heat radiated from the earth's surface, 4p., March 18, 1884
9. Brashear, J.A. Allegheny, PA. [Page one not legible thus difficult to determine precise nature of correspondence. It appears that Langley has constructed a "Hot Box", Ed.], 6p., March 26, 1884
10. Hazen, W.B. Washington, DC. Observation of a "remarkable sunspot" seen on November 16, 1882, 1p., March 26, 1884
11. Comu, A. Concerning a new method for distinguishing between helluric and solar absorption, 2p., April 11, 1884
12. Fritts, E.E. New York, NY. Requests a sheet of selenium for experimental purposes, 2p., April 20, 1884
13. Grunow, William. West Point, NY. Acknowledge receipt of 0.1 mm. strip bolometer which perfoms well, 1p., April 29, 1884
14. Rockwell, A.F. Washington, DC. Opinion on the wiring of underground cable, 2p., April 30, 1884
15. Powell, J.W. Washington, DC. "Desirability of making a trial up Mt. Whitney", 4p., May 5, 1884
16. Snyder, W.B. Philadelphia, PA. Forwarding bolometer to the International Electrical Exhibition at the Franklin Institute, 1p., May 19, 1884
17. Brashear, J.A. Allegheny, PA. Langley proposes to use, in place of a concave mirror of silver copper, a flat mirror silvered on the front face in order to read the reflected scale of his galvanometer, 2p., May 21, 1884
18. Thaw, William. Allegheny, PA. Annual report [1883/84] to the Committee of the Allegheny Observatory, 7p., May 27, 1884
19. Grunow, William. West Point, NY. Encloses sketches of a new method of constructing a platinum bolometer, 2p., June 2, 1884
20. Lowny, R. Washington, DC. The abolition of the U.S. Coast and Geodetic Survey as a separate service would be a "misfortune", 1p., June 16, 1884
21. Grunow, William. West Point, NY. French people requesting one linear and one square bolometer, 1p., June 22, 1884
22. Thaw, William. Allegheny, PA. Speculated transfer of Allegheny Observatory Trust to a Massachusetts institution, 2p., June 24, 1884
23. Peal, S.E. Naharani, India. Theoretical measurement of lunar temperature, 2p., June 30, 1884
24. Mills, N. Washington, DC. Receives proof copy of pages 215 to 219 of Mt. Whitney Report, 1p., September 17, 1884
25. Brashear, J.A. Allegheny, PA. Langley requests preparation of a glass cover mirror to be used in a new spectroscope, 1p., September 27, 1884
26. Thomson, William. Glasgow, Scotland. Allegheny Observatory has obtained conclusive evidence as to the character of the ultra-red bands. Suspects that they are probably telluric, 2p., October 6, 1884
27. Brashear, J.A. Allegheny, PA. Request to assemble a "Hot Box", 1p., October 31, 1884
28. Mills, N. Washington, DC. Recommends a subject index for the mt. Whitney Report, 2p., November 3, 1884
29. Franklin, S.R. Washington, DC. Langley welcomes change to midnight as the commencement of the astronomical day, 1p., December 20, 1884
30. Grunow, William. West Point, NY. Spectro-bolometer arrived too late for "special occasion it was remodeled for", 1p., January 7, 1885
31. Grunow, William. West Point, NY. Request for two cubical vessels made of brass, 1p., February 7, 1885
32. Grunow, William. West Point, NY. Requests that an estimate of cost of siderostat be sent, 1p., February 18, 1885
33. Tyndall, John. London, England. Observatory will be conducting research on the absorption of radiant heat by water vapor, 1p., February 18, 1885
34. Brashear, J.A. Allegheny, PA. Brashear appointed to make all bolometer cases of one uniform use. Sketch of proposed changes in bolometer case enclosed, 1p., February 25, 1885
35. Holden, E.S. Determination of the amount of light transmitted by Professor Holden's wave gauge screens, 2p., ca. February
36. Grunow, William. West Point, NY. Bolometers examined are up to standard. Approximate resistances are stated, 2p., March 14, 1885
37. Hazen, W.B. Washington, DC. A discussion of most efficient method for studying the "selective absorption of solar radiant heat" Also sketch enclosed of proposed physics-meteorological laboratory, 7 p., March 14, 1885
38. Mills, N. Washington, DC. Reply to "certain meteorological researches alluded to by the New York Herald", 1p., March 16, 1885
39. Goff, M.B. Pittsburgh, PA. A brief statement of the nature of the work of the observatory addressed to the chancellor of Western University of Pennsylvania, 7p., March 18, 1885
40. Peal, S.E. Naharani, India. Concerning the direct measurement of lunar heat, 1p., June 12, 1885
41. Baird, F.S. Washington, DC. Inquiry as to whether Smithsonian Institute would assist in foreign distribution of Mt. Whitney Report prepared by Allegheny Observatory, 1p., June 26, 1885
42. Tatlock, John. Beloit, Wisconsin. States that the Allegheny Observatory was the first to establish an electric time service to railways, 2p., July 3, 1885
43. Bramwell, Frederick. London, England. Acknowledgement of receipt of communication of May 14, 1885 extending thanks to members of Royal Institution for expression of their satisfaction with discourse delivered in April 1885, 1p., July 7, 1885
44. Blanford, Henry F. Langley inquiring about the temperature of surfaces of "rock or soil, uncovered by snow, at very great altitudes", 2p., July 14, 1885
45. Whymper, Edward. London, England. Has forwarded a copy of observations on Mt. Whitney in the Sierra Nevadas which discusses primarily theoretical temperatures of airless planets, 2p., July 14, 1885
46. Julius, W.H. Utrecht, Holland. Concerning the determination of wavelengths of heat emitted from bodies below incandescence, 3p., August 14, 1885
47. Goff, M.B. Pittsburgh, PA. Making inquiry through Western Union Telegraph Co. concerning a meteor sighting, 1p., October 5, 1885
48. Science Magazine. Reports of a meteor in Western Pennsylvania on September 26, 1885 unfounded, 2p., October 7, 1885
49. Tyndall, John. London, England. Submits by mail a paper on lunar heat, 2p., October 14, 1885
50. Brashear, J.A. Allegheny, PA. Langley requests that Brashear observe "siderostat to see whether a needed adjustment can be introduced to make the telescope [Langley;s] parallel to the declination (and free from present shake)" Sketch enclosed, 2p., October 28, 1885
51. Goldback, C. Kehl, Germany. States that observatory is using rock-salt for researches on radiant heat, 1p., November 7, 1885
52. Grunow, William. West Point, NY. Requests construction of a bolometer to consist of 3 central strips each 1 mm. wide and 10 mm. in length to be made of platinum which was "heavier than usual", 1p., November 7, 1885
53. Austin, W.W. Johnstown, PA. Response to letter of inquiry requesting longitude and local time of Johnstown, 1p., November 24, 1885
54. Warner and Suazey. Cleveland, Ohio. Wishes to replace governor of siderostat driving clock, 2p., November 25, 1885
55. Brashear, J.A. Allegheny, PA. Discusses conversation with W. Thaw. Request for two 18 mm. discs. Also Langley requests Brashear's presence so that he might present him with a sketch and definite order for work to be done on galvanometer, 2p., November 30, 1885
56. Barber, D. Professor Langley wishes to purchase an economical storage battery which will be efficient in maintaining a steady dynamo current, 1p., December 1, 1885
57. Brashear, J.A. Allegheny, PA. Langley requests that the following work be executed for Allegheny Observatory: 1) construction of small mirrors for galvanometer; 2) adjustment of galvanometer back and head screw; 3) construction of scale lamp; 4) construction of siderostat and siderostat mirror; 5) construction of other mirrors. Memoranda supplying specifications and sketches enclosed, 7p., December 4, 1885
58. Brashear, J.A. Allegheny, PA. Request for a larger lens [usage not specified, Ed.] and a modification of previous order for siderostat mirror. Sketch enclosed, 1p., December 5, 1885
59. Brashear, J.A. Allegheny, PA. Request for rock-salt lens of about 75 mm, 1p., December 8, 1885
60. Achert, E.E. Denver, Colorado. Langley requests a specimen of rock "capable of furnishing a lens of nearly three inches diameter", 1p., December 10, 1885
61. Crunow, William. West Point, NY. Langley posts three carbon filaments, 2p., December 19, 1885
62. Hill, Clark Co. Boston, MA. Seeking advice concerning the efficiency of a self-starter as applied to a 4 horse otto gas engine, 1p., January 7, 1886
63. Marshall, W.H. Pittsburgh, PA. Explanation of "primary colors" A.L.S. 2p., January 7, 1886
64. Wiedemann's Annalen. Leipzig, Germany. Submitting by mail a manuscript on unrecognized wavelengths, 2p., January 9, 1886
65. Brashear, J.A. Allegheny, PA. Request for shipment of galvanometer and siderostat mirror, 1p., January 14, 1886
66. Foote, A.E. Philadelphia, PA. Request for half dozen dragonflies. [Perhaps has some relation to aerodynamic experimentation, Ed.] A.L.S. 1p., January 16, 1886
67. Brashear, J.A. Allegheny, PA. Observatory has not yet received galvanometer, 1p., January 18, 1886
68. Colby, E.A. Newark, NJ. Carbon filaments used in conjunction with galvanometer, 1p., January 19, 1886
69. Grunow, William. West Point, NY. Request for construction of a linear bolometer, 1p., January 19, 1886
70. Frost, A.G. Youngstown, Ohio. "Approximate relative positions of the Sun, the Earth and Venus in January 13, 1886 viewed from the North Side of the Plane of the Ecliptic" Sketch enclosed, 1p., ca. January
71. Brashear, J.A. Allegheny, PA. States reasons, lose of light and glare, for defects in opaque seals, 1p., February 8, 1886
72. Rise and Guager. Request for construction of one copper and one galvanized iron box. Sketches enclosed, 2p., February 8, 1886
73. White, Martin. Glasgow, Scotland. Bolometer function and usage, 1p., February 10, 1886
74. Faye, A.E. Paris, France. Requests that chief signal officer of the U.S. Army forward a copy of Volume XV of the signal service publication "Research in Solar Hear",1p., February 18, 1886
75. Hodgkins, H.L. Washington, DC. Results of computations recently made were correctly deduced from given data, 2p., February 20, 1886
76. Brashear, J.A. Allegheny, PA. F.W. Very requesting that Brashear prepare a condensing lens. L. 2p., March 4, 1886
77. Rucker, A.W. London. Bolometers not suitable for lecture demonstration, 2p., March 11, 1886
78. Ball, John. London, England. Langley posts copy of his paper "On the Amount of the Atmospheric Absorption", 1p., March 12, 1886
79. Hazen, W.B. Washington, DC. Wishes to record "the motion of a galvanometer needle by means of photography", 2p., March 16, 1886
80. Vincent, H.B. McConnelsville, Ohio. No "systematic distribution of time to places outside of Pittsburgh" by the Allegheny Observatory, 1p., March 16, 1886
81. White, Martin. Glasgow, Scotland. Request for a more sensitive reflecting galvanometer, 2p., March 16, 1886
82. Grunow, William. West Point, NY. Carbon bolometer "a mechanical success" but does not perform as well as expected, 3p., March 29, 1886
83. Ball, John. London, England. Langley discusses temperature variations of the soil of the full moon, 2p., April 19, 1886
84. Marson, G. Paris, France. Submitting by mail to Annales de Chimie et de Physique in a few days complete illustrations for an article on "Invisible Spectrum and their wavelengths", 1p., April 19, 1886
85. Thomson, William. Glasgow, Scotland. Research just completed on the relation of the index of refraction to wavelength by utilizing a mirror galvanometer, 1p., April 19, 1886
86. Western Union Telegraph Co. Pittsburgh, PA. Request for names of firms, corporations, or individuals receiving clock signals over the Western Union wires, 1p., May 8, 1886
87. Grunow, William. West Point, NY. New bloomer case received and is "very satisfactory", 1p., May 17, 1886
88. Thomson, William. Glasgow, Scotland. Soon to announce research completed in the area of the heat spectrum, 1p., May 18, 1886
89. Grunow, William. West Point, NY. Langley returning bolometer No. 4 because its "working badly having very unequal resistance" Requests its immediate return and wishes to know with what thickness of platinum it is filled, 2p., May 19, 1886
90. Gibbs, G.W. New Haven, Connecticut. Seeking counsel in area of theoretical optics, 2p., May 25, 1886
91. Darwin, G.H. Cambridge, England. Langley states that he is conducting research on wavelengths in the infrared spectrum and most probably will not be able to attend an international conference in England, 2p., May 29, 1886
92. Spoere, G.S. Potsdam, Russia. Concerning sources of solar radiant heat, 2p., May 29, 1886
93. Landslo, H. Berlin, Germany. An explanation of determination of wavelengths of infrared lines, 2p., May 31, 1886
94. Gibbs, G.W. New Haven, CT. Acknowledges thanks for assistance received in solving a problem in theoretical optics, 1p., June 7, 1886
95. Hodgkins, H.L. Washington, DC. Request for assistance in computing solution to a problem in optical physics, 2p., June 7, 1886
96. Marson, G. Paris, France. Submitting by mail to the editor of Annales de Chimie et de Physique the completed manuscript of the research referred to in the Comptes Rendus of January 18, 1886, 2p., June 9, 1886
97. Aitken, John. Edinburgh, Scotland. Langley requesting literature on the subject of nocturnal radiation, 1p., June 11, 1886
98. Grunow, William. West Point, NY. Refilled bolometer No. 14 which arrived in "good order" Several bolometers in need of repair are forwarded along with a new alloy which is said "to possess superior qualities for a bolometer." Lastly, Grunow is cited in European journals as the manufacturer of the Langley bolometer, 2p., June 11, 1886
99. Kedzee, J.H. Chicago, Illinois. A critique of a book written by Kedzee on solar radiation, 1p., June 12, 1886
100. Goff, Milton B. Pittsburgh, PA. A list of assistants at the Allegheny Observatory, 1p., June 18, 1886
101. Hodgkins, H.L. Washington, DC. Request for assistance in computing solutions to an equation. [The nature of which is unspecified, Ed.], 1p., June 23, 1886
102. Hodgkins, H.L. Washington, DC. Computations received and "appear to be satisfactory", 1p., July 24, 1886
103. Ashburne, Charles A. Philadelphia, PA. Letter with map indicating position of observatory relative to neighboring streets, 1p., July 26, 1886
104. Pickering, E.G. Cambridge, MA. "Measurement of the transmission of the Pritchard Wedge," i.e., measuring transmission of solar radiation via bolometer usage, 18p., July
105. Grunow, William. West Point, NY. Bolometer No. 13 "measured fairly near equal but neither time would the needle stay in any fixed position but went off the scale", 1p., October 5, 1886
106. Nature Magazine. Supplies Nature with an explanation of the corona of a recent eclipse, 2p., October 16, 1886
107. Grunow, William. West Point, NY. Langley requests construction of a new bolometer case with an improved eyepiece, 1p., November 1, 1886
108. Johnson, J. Pittsburgh, PA. An explanation of how and when time signals are furnished to local railroads. November 4, 1886
109. Grunow, William. West Point, NY. Ducretet's bolometer performing well, 1p., November 6, 1886
110. Hall and Sons. Buffalo, NY. Instructions for modifying construction of a crucible to be used in determining the radiation of "an entirely fixed temperature which will be given out by a piece of platinum placed at the closed end of a tub", 2p., November 16, 1886
111. Konig, Arthur. Berlin, Germany. A discussion of bolometer usage, 2p., November 17, 1886
112. Grunow, William. West Point, NY. Bolometer No. 13 "turns out to be all right". "Langley makes some slight modifications for the future construction of the bolometer thread," and inquires as to whether European orders for bolometers have increased, November 18, 1886
113. Reed, J.R. Pittsburgh, PA. Comments on Reed's mathematical theory of the bolometer, 2p., November 23, 1886
114. Grunow, William. West Point, NY. States main points of improvement for a new spectrometer for the bolometer, 2p., November 29, 1886
115. Hall and Sons. Buffalo, NY. Hoping to secure crucibles and furnace while visiting Washington, DC, 1p., December 2, 1886
116. Brown, S.C. Washington, DC. Langley extends thanks to Chief Clerk of the U.S. Dept. of State for mediation in receipt of Rumford Award by the Royal Society, 1p., December 3, 1886
117. Hall Sons. Buffalo, NY. Request for a "movable plug which can be sled up a lateral radiation tube", 1p., December 4, 1886
118. Hall and Sons. Buffalo, NY. "Please forward any work as finished", 1p., December 14, 1886
119. Rucker, A.W. London, England. Due to its sensitivity, Langley does not recommend public demonstration of bolometer, 2p., December 14, 1886
120. Rucker, Arthur W. London, England. Forwarding bolometers to the Royal Institution, 2p., December 14, 1886
121. Pickering, E.G. Cambridge, MA. Use of 5th hour meridian in determination of Pittsburgh local time, 2p., December 15, 1886
122. Thomson, William. Glasgow, Scotland. Has succeeded in getting "wonderful results" from Thomson's galvanometer, 1p., December 19, 1886
123. Hall and Sons. Buffalo, NY. Deviation from original drawing in manufacture of crucibles received, 2p., December 29, 1886
124. Brown, James. Allegheny, PA. Concerning irregular receipt of time signals by the City of Allegheny, PA, 1p., January 8, 1887
125. Ledzee, J.H. Chicago, IL. Allegheny Observatory has not "analyzed the heat radiation of any star or planet", 1p., January 10, 1887
126. White, James. Glasgow, Scotland. Request for a nonastatic needle, to measure feeble current. Full specifications of instrument supplied, 3p., January 12, 1887
127. Brashear, J.A. Allegheny, PA. Langley requests construction of a "short striding level" utilizing a transit bulb. Sketch enclosed, 1p., January 14, 1887
128. Grunow, William. West Point. NY. Gold and silver alloy bolometer not working well and is returned, 1p., January 20, 1887
129. Anthony, W.A. Ithaca, NY. Langley specifies that his bolometer is not "well adapted for lecture experimentation" and proceeds to provide dimensions for ordering a demonstration model only, 1p., January 24, 1887
130. Grunow, William. West Point, NY. Sketches and detailed explanation of design of a "strong independent mounting for the collimator arm", 10p., January 25, 1887
131. Grunow, William. West Point, NY. Submitting modifications to be made in construction of colliminator arm, 2p., January 27, 1887
132. Tinlow, G.W. Warwick, NJ. Acknowledgement of request for all names of publications dealing with the theory of the bolometer, L., 1p., February 5, 1887
133. Brill and Co. Philadelphia, PA. An order of wood of which car seats were made [possibly related to aerodynamic experimentation. E.], 1p., February 7, 1887
134. Lamansky, S. St. Petersburgh, Russia. Will forward results of investigations on the infra-red spectrum,1p., February 14, 1887
135. Grunow, William. West Point, NY. Langley wishes to refill bolometer No. 13, L. 1p., February 23, 1887
136. Gray, Thomas. Glasgow, Scotland. Awaiting with interest the announcement of the performance of a new nonastatic galvanometer, 1p., March 5, 1887
137. Hall Sons. Buffalo, NY. Not able to report on performance of crucibles which lack "plugs as their specifications demanded", 1p., March 5, 1887
138. Grunow, William. West Point, NY. Request for status of bolometers nineteen and thirteen, 1p., March 7, 1887
139. Johnston and Co. Pittsburgh, PA. Request for a heavier rubber elastic band than the one enclosed. [rubber related to flight experimentation, Ed.], 1p., March 7, 1887
140. Warner and Swazey. Cleveland, OH. An examination of the siderostat driving clock of the Allegheny Observatory, L., 2p., March 7, 1887
141. Peal, S.E. Naharani, India. Speculation of lunar temperature, a response to paper submitted to Langley by Peal, 2p., March 8, 1887
142. Powell, J.W. Washington, DC. Request for an opinion concerning Peal's lunar heat hypothesis, 2p., March 8, 1887
143. Fleuriais. Paris, France. Langley desirous to obtain a "mechanician familiar with the construction of gyroscopes", 2p., March 9, 1887
144. Glaiser, James. Blackheath, England. Request for data concerning mechanical flight, 1p., March 9, 1887
145. Johnston and Co. Pittsburgh, PA. Rubber band received buy lacking in both strength and weight. [Related to flight experimentation, Ed.], 1p., March 9, 1887
146. Rayleigh. Presently conducting experiments on the resistance of air of bodies in motion. Tequest for recommendations concerning any line of investigation likely to be of special interest, 1p., March 9, 1887
147. Thurston. Langley requests information on: first, the names of modern authorities "on air in motion at various inclinations to it"; second, the title of a modern work on wind mills; third, information of the Cunard streamers. Fourth, the name of a "really intelligent and trustworthy model-maker", 2p., March 9, 1887
148. U.S. Army, Chief Signal officer. Washington, DC. Request for information pertaining to resistance of plane surfaces to air in motion, 1p., March 9, 1887
149. Grunow, William. West Point, NY. Langley wishes to order a new bolometer to be numbered 20, L., 1p., March 19, 1887
150. White, James. Glasgow, Scotland. Modifications to be made in construction of a galvanometer. Sketch enclosed, L.,1p., March 19, 1887
151. Phillips and Co. Request for elastic rubber [probably to be used in aerodynamic experimentation, El.], 1p., March 26, 1887
152. Phillips and Co. Pittsburgh, PA. Submitting order for elastic rubber to be used in aerodynamic experimentation, 1p., March 28, 1887
153. Brashear, J.G. Allegheny, PA. Working drawings for Whirling Table nearly completed, 1p., March 30, 1887
154. Tennant, George B. Pittsburgh, PA. Modification in specification of Whirling Table, 1p., March 30, 1887
155. Specification of the Whirling Machine, A.D.S., 2p., ca. March
156. Christern, F.W. New York, NY. Request for information pertaining to cost of the publication, L'Aeronaute, 1p., April 12, 1887
157. Christern, F.W. New York, NY. Request for price of publication Histoire des Ballons by Gaston Fissandier, L., 1p., April 21, 1887
158. Brashear, J.A. Allegheny, PA. Sketch of [Whirling Table?], 1p., April 25, 1887
159. Brashear, J.A. Allegheny, PA. Experiments indicate that double wheel model [aircraft] should be discontinued and replaced by Renaud aircraft. Sketch of Renaud aeroplane enclosed, 3p., April 26, 1887
160. Queen and Co. Philadelphia, PA. Wishes to obtain a tachometer or tachograph. [Probably related to aerodynamic experimentation, Ed.], 1p., April 26, 1887
161. Phillips and Co. Pittsburgh, PA. Please state cost, width, and length of roll of elastic rubber to execute order for rubber 1/8 and also 1/4 inch thickness, 1p., April 27, 1887
162. U.S. Army, Chief Signal Officer. Washington, DC. Concerning the absolute temperature of the earth's surface and the measurement of solar radiation, 3p., April 27, 1887
163. Concerning the "true color of the sun", A.D.S., 2p., ca. April
164. Fire Department. Allegheny, PA. Complaints concerning inaccurate time signals to be directed to the Allegheny Observatory, L., 1p., May 7, 1887
165. Tennant, George B. Philadelphia, PA. Check enclosed in payment for services rendered in preparation of drawings and estimates for a Whirling Table, 1p., May 18, 1887
166. U.S. Treasury Dept., Bureau of Statistics. Washington, DC. A list of Langley's scientific papers published by the U.S. Government, L., 1p., May 18, 1887
167. Brashear, J.A. Allegheny, PA. Sketch of aeroplane [barely legible, Ed.], 2p., May 20, 1887
168. Christern, F.W. New York, NY. Second request for ordering publication L'Aeronaute, 1p., May 25, 1887
169. Thaw, William. Pittsburgh, PA. Annual Report 1886/87 of the Director, 6p., ca. May
170. Rowe, Charles O. Titusville, PA. Response to inquiry concerning time service, 1p., June 2, 1887
171. Rowe, Charles O. Titusville, PA. A "description of the devices for striking time signals" L. 2p., June 3, 1887
172. Ballot, Buys. Ultrecht, Holland. Expresses interest on status of research in the area of lunar heat, 1p., June 13, 1887
173. Clerke, Agnes M. London, England. Concerning studies on absorption of the earth's atmosphere, 3p., June 13, 1887
174. Warner and Swasey. Cleveland, Ohio. Request for a siderostat driving clock be repaired as soon as possible, L., 1p., June 14, 1887
175. Stoletow, A. Moscow, Russia. Concerning radiation analysis by means of heat spectrum and aid of bolometer, 2p., June 17, 1887
176. Queen and Co. Philadelphia, PA. Second request for ordering information pertaining to tachometer and tachograph, 1p., June 18, 1887
177. Hazen, Allen. Washington, DC. Erecting a Whirling Table of "exceptional size" to carry out experiments in anemometry and the resistance of air to bodies in motion including railroad trains. Expects to make experiments in fall with a locomotive and platform cars, 2p., June 25, 1887
178. Woodwell and Co. Pittsburgh, PA. Wishes to obtain a tachometer and dynamometer, 2p., June 25, 1887
179. Brashear, J.A. Allegheny, PA. Concerning the mounting of two large reflecting mirrors at the Allegheny Observatory, 3p., June 29, 1887
180. District Telegraph Co. Pittsburgh, PA. Wire from which railroads are receiving time signals running into several jewelry stores, 2p., June 29, 1887
181. Metzgar, Henry. Pittsburgh, PA. Serious complaints from railroads for not receiving time signals, 1p., July 2, 1887
182. Abbe, Cleveland. Washington, DC. Request for a chronograph cylinder to be used for aerodynamic experimentation, 2p., July 5, 1887
183. Rotch, A. Lawrence. Request for data on the varying velocity of the wind during short intervals of time, e.g., every quarter of minute or less. Further that Rotch request attach a chronograph to an anemometer which would record electronically the varying velocities on a uniformly revolving board, 2p., July 5, 1887
184. Rowe, Charles O. Titusville, PA. Request for a pole to be set up close to the Observatory with wires leading to the top of chromograph [Probably be used in measurement of wind velocity, Ed.], 1p., July 5, 1887
185. Grunow, William. West Point, NY. Request fro sketch of collimator and prism table, 3p., July 8, 1887
186. White, James. Glasgow, Scotland. Inquiry as to when galvanometer will be completed. No acknowledgement of letter of March 19, 1887, 1p., July 8, 1887
187. Queen and Co. Philadelphia, PA. Purchasing tachometer no. 4 running from 25 to 3000 revolutions per minute, 1p., July 12, 1887
188. Rotch, A. Lawrence. Acknowledgement of receipt of chronographic record. Requests that record should in the future be obtained on a time scale, ten times as long, "so that the changes from minute to minute can be recognized during an hour or so", 1p., July 13, 1887
189. Rowe, Charles O. Titusville, PA. Acknowledgement of receipt of pole used in connection with chromograph, 1p., July 14, 1887
190. Description of "self recording apparatus to be placed at end of arm of great Whirling Table", 8p., July 15, 1887
191. Glassford, W.O. Prescott, Arizona. Corcerning the variations of solar radiation from hour to hour, L., 3p., August 3, 1887
192. Ohio Meteorological Bureau. Youngstown, OH. Diagram of the positions of Venus, Earth, and Sun on August 14, 1887, L., 1p., August 19, 1887
193. Langley, J.A. Washington, DC. Status of research at Allegheny Observatory. Whirling Table not yet erected, L., 5p., September 10, 1887
194. Reid, H.F. Cleveland, OH. Concerning strongest current a bolometer will bear, L., 1p., September 15, 1887
195. Reid, H.F. Cleveland, OH. Specifications of bolometer, no. 1, L., 1p., September 28, 1887
196. Grunow, William. West Point, NY. Wishes to test collimator and prism table, 1p., November 8, 1887
197. De Motte, John B. Greencastle, IN. Brief description of bolometer manufacture and usage, L., 1p., November 9, 1887
198. Peal, S.E. Naharain, Sigsagar, India. Lunar research nearly completed. Findings to be issued by U.S. Government Printing Office, 1p., November 9, 1887
199. Barus. Determination of the relation between emission and temperature by spectrobolometric methods, 1p., November 23, 1887
200. Hall and Sons. Buffalo, NY. Request for a dozen crucibles. Sketch enclosed, 1p., November 23, 1887
Volume 3 Samuel Langley and Frank Very, 1887-1888
1. Smyth, Thomas H. Toronto, Canada. A bolometer might be devised to measure the temperature of a liquid, 2p., January 26, 1888
2. Thaw, William. Pittsburgh, PA. Requests permission to allow J.A. Brashear to use thirteen-inch equatorial to conduct his own research, T.L.S., 2p., January 27, 1888
3. De Motte, John B. Greencastle, IN. Forwarding information concerning bolometer theory and place and name of manufacturer of bolometer, 2p., January 31, 1888
4. De Motte, John B. Greencastle, IN. Sending two pamphlets containing illustrations and full descriptions of the bolometer and its theory, 2p., January 31, 1888
5. Reid, H.F. Cleveland, OH. Acknowledge of receipt of description of experiments with the bolometer by Professor H.F. Reid of the Case School of Applied Science, January 31, 1888
6. Brashear, J.A. Allegheny, PA. Brashear directed to prepare a scale for the "White" galvanometer. Also a request for 4 galvanometer mirrors of 1 meter values of curvature, 1p., February 2, 1888
7. Brashear, J.A. Allegheny, PA. Langley authorizes Brashear to use 13 inch equatorial of Allegheny Observatory for his own researches, 2p., February 2, 1888
8. White, James. Glasgow, Scotland. Generally pleased with finish and solardarity of galvanometer. However, hinges to enable magnets to be unclasped from glass rod were disregarded, 1p., February 2, 1888
9. Brashear, J.A. Pittsburgh, PA. Preparation of a box of seasoned pine to hold the new "White" galvanometer, L., 3p., February 3, 1888
10. Grunow, William. West Point, NY. Final modifications of dynometer - chronograph made by Brashear in Pittsburgh, T.L.S., 2p., February 16, 1888
11. Langely, S.p., Washington, DC. Very conducting experiments with humming birds, L., 2p., February 25, 1888
12. Brashear, J.A. Allegheny, PA. "Langley wishes to have made for the Smithsonian Institute a rocking case with plate glass top, mirror at sides and bottom and spring stands to hold twenty humming birds" Sketch enclosed, L., 2p., February 29, 1888
13. Abney, W. de. Wivelislile London, England. Concerning atmospheric absorption of acceptance of post at Smithsonian Institute, 6p., February
14. Sheaffer, C.W. Pittsburgh, PA. "Scarcely any current in the telegraph line", L., 1p., March 1, 1888
15. Mead, Elwood. Ft. Collins, CO. Provides ordering information for actinometer and spectrobolometer. Supplies instructions for use of instruments in place of aforementioned ones, 2p., March 5, 1888
16. Rood. Wishes to obtain data concerning the "brightness of the normal eye to the pure spectrum colors", 1p., March 14, 1888
17. Batchalde, A. Pelham, NH. Concerning the relationship between lightning and the fall of meteoric dust, L., 1p., March 21, 1888
18. Witchell. "Taking measures of the intensity of different colored lights taking for instance red, yellow, blue, or any number of other spectral colors from the same sources and same prism, and trying the comparative intensities of each by noting the relative illuminating powers by suitable tests for the normal eye", 1p., March 30, 1888
19. Pennsylvania Railroad. Altoona, PA. Posting a copy of a printed circular describing time signal distributions, L., 1p., April 5, 1888
20. McIntire, Johnston. Allegheny, PA. Langley wishes a box to be constructed to house stuffed humming birds. Sketch enclosed, L., 2p., April 28, 1888
21. Brashear, J.A. Allegheny, PA. Wishes to have a 20 inch mirror of one meter focus silvered, 1p., May 11, 1888
22. Grunow, William. West Point, NY. Concerning construction of a spectrobolometer which must be completed within ten months, 2p., May 11, 1888
23. Hale. No French engines for utilizing solar heat more recent than those of Mouchot, exhibited in 1878. French commission report engine not feasible to operate. J. Ericson's engine not economically feasible to operate, 1p., May 11, 1888
24. McIntire, Johnston. Allegheny, PA. Modifications in construction of box to contain stuffed humming birds, L., 1p., May 11, 1888
25. Reuben, Levi. New York, NY. Acknowledgement of receipt of the book, Travels in the Air. Langley states also with regard to inequalities in the distribution of clouds and rain that he cannot render a judgment on such a meteorological question, 1p., May 15, 1888
26. Thomson, W. Philadelphia, PA. Request for the title of the best treatise on color vision, L., 1p., May 24, 1888
27. Thaw, William. Pittsburgh, PA. Statement of cash receipts and expenditures of the Allegheny Observatory also includes annual report 1887/88 on the "scientific labors of the Observatory" [one page not legible, Ed.], T.L.S., 6 p., ca. May
28. Grunow, William. West Point, NY. No response concerning construction of spectrobolometer. Langley soon to depart for Europe, 1p., June 23, 1888
29. Crova, A. Montpelliar, Vermont. Concerning a new value of the solar constant. Description of galvanometer usage and sketch of galvanometer enclosed, 3p., June 25, 1888
30. Notes on the History of the Doctrine of Radiant Energy, A.D. S., 10p., ca. June
31. Grunow, William. West Point, NY. Dynomemterchronograph found to be a very satisfactory instrument but a few modifications necessary, T.L.S., 1p., July 12, 1888
32. Ticknor and Co. Boston, MA. Possibility of publishing a cheap edition of the New Astronomy in the U.S. and a costly edition in England, 1p., August 13, 1888
33. Peal, S.E. Naharani, Sibsagar, India. Commentary on the nature of the moon's rays, L., 2p., August 15, 1888
34. American Journal of Science. New Haven, CT. Enclosed copy of article entitled "Energy and Vision" for November publication, 1p., September 28, 1888
35. American Journal of Science. New Haven, CT. Concerning the return of the proof copy of an article entitled "Energy and Vision", 1p., October 23, 1888
36. London, Edinburgh, and Dublin Philosophical Magazine. Forwarding proof of an article on "Energy and Vision", which was expected to appear in the American Journal of Science for November, 1888, 1p., October 23, 1888
37. Gibbs, Wilcott. Newport, RI. Langley prepared to make a personal examination of disposition of Bache fund for purposes specified on researches in solar physics; description of research in progress, 2p., November 5, 1888
38. Brashear, J.A. Allegheny, PA. Langley providing Brashear with assistance in determining the "dispersive power" of a crown lens, 2p., November 9, 1888
39. Accounts payable for October and November, 1888, L., 1p., Allegheny, PA, November 22, 1888
40. American Journal of Science. New Haven, CT. Request for 500 copies in paper covers of History of a Doctrine, 1p., December 3, 1888
41. Ballot, Buys. Ultrecht, Holland. Will post in a few days an abstract of the paper, "On the Solar and Lunar Spectrum," published in the December 1888 issue of the Journal of Science, 2p., December 3, 1888
42. Turner, S.E. Pittsburgh, PA. Wishes to have the "shaft of the turn table made frictionless", 2p., December 3, 1888
Volume 4 Samuel Langley, Frank Very, and James Keeler, 1889-1891
1. [Memorandum] Authorization for removal of pieces of apparatus, which were the personal property of Mr. W. Thaw, to the personal charge of Langley. Signed by W. Thaw, A.D.S., 2p., June 19, 1889
2. Annual Report [1888/89] of the Director of the Allegheny Observatory, A.D.S., 4p., ca. June

Box 31
Volume 1 James Keeler, 1887-1894
Volume 2 Frank Very and James Keeler, 1892-1895
Volume 3 James Keeler, John Brashear, F.L.O. Wadsworth, and Henry Harrer, 1895-1901

Box 32
Volume 1 John Brashear, 1898-1900
Volume 2 F.L.O. Wadsworth, 1901-1902
Volume 3 F.L.O. Wadsworth, Frank Schlesinger, and Frank Bailey, 1902-1906

Box 33
Volume 1 F.L.O. Wadsworth, 1896-1902

Box 34
Volume 1-3 Frank Schlesinger, 1907-1910

Series III. Directors/Acting Directors Miscellany, 1863-1978

Scope and Content Notes:

Series III contains publications, correspondence, articles, notes, manuscripts and other miscellaneous materials arranged by Director.

Subseries 1. Samuel Langley

Section: Publications

Box 35
Folder 1 Articles by Langley
Folder 2 Bound Volumes of Langley Works
Folder 3 Samuel Pierpont Langley - His Early Academic Years of Western University of Pennsylvania, by Wallace Beardsley 1978
Folder 4 Rules and Regulations, by the London Chathan and Dover Railway Company, 1863

Box 35a
Folder 5 Bound volume of Langley publications, most dealing with the Mt. Whitney expedition

Box 36
Folder 6 Resolution passed by the Board of Regents of the Smithsonian Institution on Langley's death, 1906

Section: Correspondence

Folder 7 Correspondence of Langley relatives, 1908-1909, 1911, 1942,
Folder 8 Handwritten Instructions in user of "waste book", September 15, 1890

Section: Notes and Manuscripts

Folder 9 Notes on Newton's Optics
Folder 10 Untitled

Subseries 2. Frank Very

Folder 11 Articles by Very
Folder 12 Articles about Very
Folder 13 Notes and Manuscripts

Subseries 3. James Keeler

Folder 14 Articles by Keeler

Subseries 4. John Brashear

Folder 18 Articles by Brashear
Folder 19 Articles about Brasheas
Folder 20 Catalogs of John A. Brashear, Co., Ltd.
Folder 21 Miscellaneous

Subseries 5. F.L.O. Wadsworth

Folder 22 Articles by Wadsworth

Box 37
Folder 23-36 Notes and Manuscripts

Box 38
Folder 37-48 Notes and Manuscripts, continued
Folder 49 Miscellaneous
Folder 15 Articles about Keeler
Folder 16 Unknown
Folder 17 Miscellaneous

Subseries 6. Frank Schlesinger

Folder 50 Publications by Schlesinger
Folder 51 Notes and Manuscripts
Folder 52 Miscellaneous

Subseries 7. Heber Curtis

Folder 53 Articles by Curtis
Folder 54 Articles about Curtis
Folder 55 Notes and Manuscripts

Box 39
Folder 56 Notebook on Spanish
Folder 57 Notebook on Mayan
Folder 58 Cash Account for Sproul Expedition through July 21, 1923

Subseries 8. Frank Jordan

Folder 59 Articles by Jordan
Folder 60 Articles about Jordan
Folder 61-66 Notes and Manuscripts
Folder 67 Journals (2 volumes), 1908-1909
Folder 68 Miscellaneous

Subseries 9. Nicholas Wagman

Folder 69 Articles by Wagman
Folder 70 Open House at the Observatory, 1951-1965

Series IV. Correspondence of Affiliated Astronomers, 1886-1972

Scope and Content Notes:

The following correspondence is available on microfilm and in its original form. For a detailed list of correspondents consult Indexes to the Microfilmed Correspondence of Directors, Acting directors, and Selected Astronomers Among the Records of the Allegheny Observatory.

Subseries 1. Frank Bartko, 1960-1971

Box 40
Folder 1 A-I
Folder 2 J
Folder 3 K-U

Section: New Material Added, 2013

Box 74
Folder 16 Frank Bartko Correspondence

Subseries 2. Wallace Beardsley, 1958-1970

Folder 4 A-Be
Folder 5 Bi-Bu
Folder 6 C-D
Folder 7 E
Folder 8 F-Ga
Folder 9 Gr-H
Folder 10 I-L
Folder 11 M-R
Folder 12 S
Folder 13 T-Z
Folder 14 Miscellaneous
Folder 15 University of Pittsburgh

Section: New Material Added, 2013

Box 74
Folder 17 Wallace R. Beardsley Correspondence

Subseries 3. Kievin Burns, 1920-1958

Folder 16 Ab-Ad
Folder 17 Ai
Folder 18 Ak
Folder 19 Akl-Alt
Folder 20 Alu-American Asso
Folder 21 American Ast
Folder 22 American C-As
Folder 23 Bab-Bal
Folder 24 Ban-Bar
Folder 25 Be-Bo
Folder 26 Bra-Bri
Folder 27-36 Brou

Box 41
Folder 37 Brow-Bu
Folder 38 Ca-Ci
Folder 39 Cl
Folder 40 Co-Cn
Folder 41 Da-Di
Folder 42 Do-Du
Folder 43-46 Ea
Folder 47 Eb-El
Folder 48 Em-Fi
Folder 49 Fl-Gae
Folder 50 Gal-Gr
Folder 51 Hak-Has
Folder 52-55 Har
Folder 56 Haw-He
Folder 57 Hi-Ho
Folder 58 Hu
Folder 59 Hy-Ins
Folder 60-61 Ins
Folder 62 Int-Jac
Folder 63 Jam-Ki
Folder 64-66 Kie
Folder 67 Kin-La
Folder 68 Le-McL
Folder 69-70 McM

Box 42
Folder 71 Ma
Folder 72-86 Meg
Folder 87-89 Mellon
Folder 90 Mellor-Mer
Folder 91-92 Mer
Folder 93 Mey-Mi
Folder 94 Moo
Folder 95 Mor
Folder 96 Mu-Pes
Folder 97 Pen-Pr
Folder 98 Po-Ru
Folder 99 Ru
Folder 100 Saint

Box 43
Folder 101 Sa-Sca
Folder 102-105 Schl
Folder 106 Schu-Shu
Folder 107 She-Sil
Folder 108-110 Sit
Folder 111 Sk-Sm
Folder 112 Sp-St
Folder 113-127 Su
Folder 128 Swa
Folder 129 Swa-Ti
Folder 130 To-U

Box 44
Folder 131 Va-Ve
Folder 132 Ve
Folder 133 Vy-Warg
Folder 134 Warn-We
Folder 135 Wi-Wo
Folder 136 Wr-Wy
Folder 137 Y-Z
Folder 138 University of Pittsburgh, B-Cl
Folder 139-142 University of Pittsburgh, Co
Folder 143 University of Pittsburgh, F-G
Folder 144 University of Pittsburgh, L-Pl
Folder 145 University of Pittsburgh, Pr-Sec
Folder 146-149 University of Pittsburgh, Sec
Folder 150 University of Pittsburgh, Si-V

Subseries 4. Zaccheus Daniel

Folder 151 A-B
Folder 152 C-D
Folder 153 F-H
Folder 154 J
Folder 155 L-P
Folder 156 R-Sa
Folder 157 Sc
Folder 158 Sk-W
Folder 159 University of Pittsburgh

Series V. Affiliated Astronomers Miscellany, no date

Subseries 1. Kievin Burns

Box 45
Folder 1 Articles by Burns
Folder 2 Articles about Burns
Folder 3-12 Notes and Manuscripts

Subseries 2. Zaccheus Daniel

Folder 13 Articles by Daniel
Folder 14 Articles about Daniel
Folder 15 Miscellaneous Material Relating to Daniel's Education
Folder 16 Miscellaneous

Subseries 3. J.H. Kiewiet de Jonge

Folder 17 Articles by de Jonge
Folder 18-22 Notes and Manuscripts

Box 46
Folder 23 Miscellaneous

Subseries 4 Wallace Beardsley

Folder 24 Stellar Radial Velletities- a report made with a grant from the U.S. Navy, along with related correspondence and financial information

Subseries 5. Robert Kemper

Folder 25 Eclipse Six (June 30, 1954), July 8, 1954

Series VI. Administrative Files, 1858-1977

Subseries 1. University of Pittsburgh (Western University of Pennsylvania prior to 1909)

Box 46
Folder 1 Catalogs for Astronomical Deptartment, 1883-1889
Folder 2 Five items to R. B. Carnahan, attorney for the University, from William Thaw, Samuel Langley and James Keeler on dispute over property boundaries of the observatory, 1885
Folder 3 Five items from N.E. Wagman on the Astronomy Department, 1961

Section: New Material Added, 2013

Box 74
Folder 18 Affirmative Action
Folder 19 Astronomy 011 Course Evaluations, Fall 1968
Folder 20 Astronomy Lab Manual
Folder 21 Intro to Astronomy Lab Manual
Folder 22 Astronomy 2 Lab Manual
Folder 23 Astronomy Lab Guidelines
Folder 24 Astronomy Lecture - George Gatewood
Folder 25 Computer Center
Folder 26 Core Curriculum
Folder 27 Course Proposal, Fall 1972
Folder 28-29 Course Syllabi
Folder 30 Department of Astronomy - Demographics, 1971
Folder 31 Department of Astronomy - Statement of Mission
Folder 32 Departmental Data
Folder 33 Eureka Newsletter
Folder 34 Exams
Folder 35 Frick Public Evening Program
Folder 36 Graduate Student Information
Folder 37 The Humanist - "Objections to Astrology"
Folder 38 Keyholder Memo
Folder 39 Kiewiet de Jonge Planner, 1971
Folder 41 Proposals
Folder 42 Seminars
Folder 43 Staff - Postcards
Folder 44 Teaching: Graduate Students
File 45 Textbooks
Folder 46 Wagman's Annual report notes, July 1962-July 1974
Folder 47 Wagman - Retirement

Subseries 2. Reports and Minutes

Box 46
Folder 5 Director's Reports, 1873, 1900-1903, 1909, 1916, 1918-1920, 1938, 1940-1941, 1951-1952, 1964-1969
Folder 6 Report detailing the duties of the Director, c. 1880
Folder 7 Various Reports
Statistics re:visitors, 1909-1956
List of Faculty, 1914-1915
Report by F. Schlesinger describing observatory, no date
Publication for the year ending June 30, 1917
Report from the committee on stellar paid taxes for the year ending June 30, 1918
Inventory of Observatory apparatus, no date
Allegheny Parralae Program, no date
Folder 8 Minutes of Allegheny Observatory and Telescope Association, May 14, 1858, May 15, 1860, November 12, 1863
Folder 9 Allegheny Observatory, 1882-1912
Folder 10 Meetings of the University concerning the Observatory, extracts, 1867-1873, August 23, 1943

Section: New Material Added, 2013

Box 74
Folder 48 Annual Fund Giving Report, 1974
Folder 49 Annual Reports, 1967-1976
Folder 50 Faculty Activity Reports, 1972-1988
Folder 51 PPBS, 1969-1973
Folder 52 Measuring Reports, 1967-1969

Subseries 3. Building Specifications

Box 46
Folder 11 General contract work specifications
Folder 12 Fire proofing
Folder 13 Plastic work
Folder 14 Tile and asphalt roofing
Folder 15 Iron work
Folder 16 Concrete floors
Folder 17 Painting and glazing
Folder 18 Marble work
Folder 19 Carpenter work
Folder 20 Metal work
Folder 21 Typed copy of contract specifications
Folder 22 Written draft of contract specifications
Folder 23 Map
Folder 24 Building dimensions
Folder 25 Building estimate
Oversize 26 Design of Observatory Dark Room
Oversize 27 Plan of Observatory, 1895
Oversize 28 Plan for an Astro-Physical Observatory, 1892

Section: New Material Added, 2013

Box 75
Folder 1a-1b Astronomical Laboratory, 1972-1973
Folder 2 Chancellor Letter on Rennovations, December 10, 1974
Folder 3 City Police, 1974-1975
Folder 4 Duquesne Light, 1955
Folder 5 Locks Installed, July 14, 1970
Folder 6 Astronomy Slides and Photos
Folder 7 Exterior Lighting
Folder 8 Furnishings
Folder 9 Lecture Hall
Folder 10 Riverview Park - Lighitng Improvements
Folder 11 Second Floor Alterations
Folder 12 Thaw Dome
Folder 13 Thaw Dome Ice Guards
Folder 14-15 Theiss Documents, 1971-1973
Folder 16 Telescopes - 6 inch Brashear Refractor
Folder 17 Telescopes - Keeler Telescope Proposal
Folder 18 Telescopes - Keeler Comparison Spark
Folder 19 Telescopes - Keeler Contracts
Folder 20 Telescopes - Keeler Correspondence
Folder 21 Telescopes - Keeler Data/Graphs
Folder 22 Telescopes - Keeler Drawings
Folder 23 Telescopes - Keeler Amplifier
Folder 24 Telescopes - Keeler Dew Warning
Folder 25 Telescopes - Keeler Mirror
Folder 26 Telescopes - Keeler Program Report, 1961
Folder 27 Telescopes - Keeler Observing Procedures
Folder 28 Telescopes - Keeler Stiffening Rods
Folder 29 Telescopes - Mellon Spectrograph Heat Management
Folder 30 Telescopes - Small Astrograph
Folder 31-33 Telescopes - Thaw Telescope Contracts, 1971-1974
Folder 34 Telescopes - Thaw Telescope Bids and Reports
Folder 35 Telescopes - Thaw Telescope Lens Alignment
Folder 36 Telescopes - Thaw Telescope Owens-Illinois Correspondence, 1973-1975
Folder 37 Telescopes - Thaw Telescope Proposal
Folder 38 Telescopes - Hartman Tests
Folder 39 Telescopes - Hartman Tests 31" Keeler Telescope
Folder 40 Telescopes - Renovation

Subseries 4. Library

Box 47
Folder 29 Books and periodicals ordered, 1899-1902
Folder 30 Books and periodicals ordered, 1903-1919
Folder 31 Donations, 1903-1923
Folder 32 List of periodicals holdings, February 6, 1952

Section: New Material Added, 2013

Box 75
Folder 41 Allegheny Observatory Library - LS 258 Project
Folder 42 Allegheny Observatory Library Renovations
Folder 43 Missing Books, August 15, 1974

Subseries 5. Allegheny Observatory Committee

Box 48
Folder 33 Reports to the Chancellor of the University of Pittsburgh, 1871
Folder 34 Reports to the Chancellor of the University of Pittsburgh, 1900-1907
Folder 35 Minutes, 1898-1901

Subseries 6. General Office Files

Folder 36 Budgets, 1867-69
Folder 37 Budgets, 1913-1935
Folder 38 Budgets, 1937-1943
Folder 39 Budgets, 1943-1949
Folder 40 Budgets, 1949-1954
Folder 41 Budgets, 1954-1957
Folder 42 Budgets, 1960-1963
Folder 43 Budgets, 1963-1969
Folder 44 Miscellaneous receipts, 1873-1909
Folder 45 Cash books, Samuel Langley, 1870-1872, 1876-1881, 1882-1892, 1891-1899
Folder 46 Cash books, Frank Very, 1870, 1871-1875, 1875
Folder 47 Cash books, Frank Very, 1878, 1879-1880, 1880-1881, 1881
Folder 48 Cash books, Frank Very, 1881, 1882, 1882-1883, 1891
Folder 49 Check receipt books, 1883-1887
Folder 50 Check receipt books, 1885-1889

Box 49
Folder 51 Check receipt books, 1889-1891
Folder 52 Petty Cash books, 1883-1891
Folder 53 Petty Cash books, 1891-1900
Folder 54 Account books, 1905-1914
Folder 55 Account books, 1914-1919

Box 50
Folder 56 Account books, 1927-1954
Folder 57 Day books, 1870-1879
Folder 58 Day books, 1895-1900
Folder 59 Cash account books, 1880-1882
Folder 60 Cash account books, 1881-1895

Section: New Material Added, 2013

Box 75
Folder 44 Budgets, 1969-1972
Folder 45 Budgets, 1972-1973
Folder 46 Budgets, 1973-1974
Folder 47 Budgets, 1974-1975
Folder 48 Budget Summary, 1977
Folder 49 General Office Equipment Corporation
Folder 50 Telephone
Folder 51 Visitors Register, 1892
Folder 52 Visitors Register, 1911

Subseries 7. William Thaw File

Section: Letters to Thaw

Box 51
Folder 61 Brashear, John A. (Astronomical and Physical Instrument Works, Allegheny, PA), September 19, 1887, April 7, 1891
Carnahan R. B. (Board of Trustees, Western University of Pennsylvania , February 13, 1885-August 19, 1885
Goff, M.B. (Chancellor, Western University of Pennsylvania), December 30, 1872
Gray, D.S. (Union Railroad and Transportation Company, Columbus, Ohio), December 4, 1871
Griggs, Joseph F. (Western University of Pennsylvania), August 4, 1890
Holland William J. (Chancellor, Western University of Pennsylvania), April 14, 1891-January 27, 1894
Folder 62 Keeler, James E. (Director, Allegheny Observatory, before 1892 of Lick Observatory, Mount Hamilton, CA), July 31, 1890-March 12, 1891, January 6, 1894
Kerr, C.U. (Western University of Pennsylvania), August 11, 1890
Koons, C.H. (Union Lane, Baltimore), February 28, 1879
Laying, J.D. (various railroad companies, Pittsburgh), November 29, 1871-May 13, 1873
Folder 63 Scott, James B. (Pittsburgh), July 24, 1890
Smith, Edmund (Pennsylvania Rail Road Company, Philadelphia), October 24, 1870
United States Chief Signal Officer (S.M. Mills), October 4, 1883
Very, Frank W. (Allegheny Observatory), January 14, 1890-May 2, 1891

Section: Letters from Thaw

Folder 64 Cassat, A.J. (Pennsylvania Railroad, Philadelphia), May 26, 1870, April 17, 1882
Carnahan, R.B. (Board of Trustees, Western University of Pennsylvania), October 9, 1884
Emerson, R.H., May 7, 1885
King, Josah and C. Hussey, May 15, 1872
Layng, J.D. (various railroad companies, Pittsburgh), November 27, 1871-May 31, 1873
Folder 65 Correspondence record, no date
Folder 66 Personal property at Observatory, no date
Folder 67 Principal observatory instruments, no date

Series VII. Observation, 1869-1930

Scope and Content Notes:

Series VII contains measurements, notebooks, journals, wastebooks, drawings, and yearbooks of observations recorded at the Allegheny Observatory arranged by astronomer.

Subseries 1. Notebooks

Section: Samuel Langley

Box 52
Folder 1-2 Longitude, 2 volumes
Folder 3 Spectroscopy
Folder 4 Wastebook, 1876-1880

Section: F.L.O. Wadsworth

Box 53
Folder 5 Astronomy and Geodesy
Folder 6 Chemical Physics
Folder 7 Chemistry
Folder 8 Civil Engineering
Folder 9 Daily Journal

Box 54
Folder 10 Elliptic Functions, Theory of
Folder 11 Field Book
Folder 12 Functions, Theories of
Folder 13 Hydraulics
Folder 14 Laboratory Notebook

Box 55
Folder 15 Lunar Host
Folder 16 Mathematics
Folder 17 Mechanism
Folder 18 Miscellaneous
Folder 19 National Academy of Arts and Sciences, Proceedings of Observations
Folder 20-21 Physics
Folder 22-23 Physics Laboratory
Folder 24 Prisms, Measuremnet of
Folder 25 Science and Engineering, Reference List of Papers
Folder 26 Specific Light
Folder 27 Theoretical Optics

Box 56
Folder 28 Thermometer, Calibration of
Folder 29 Untitled Notebook, no date
Folder 30 Unititled Notebook, 1901

Section: Frank Schlesinger and Frank Jordan

Folder 31 Unititled Notebook, 1909-1913

Section: Frank Jordan

Folder 32 Orbit of 18 aquile

Box 57
Folder 33 Orbit of lyrae
Folder 34 Orbit of orrons

Box 58
Folder 35 Orbit of serpentis
Folder 36 Radical Velocity of 25 stars

Box 59
Folder 37 Records, 1884-1930
Folder 38 Spectrographic observations of parsel

Section: Robert Baker

Box 60
Folder 39 Observations, 1907-1908
Folder 40 Observations, 1908-1909

Section: William Scaife

Box 61
Folder 41 1873

Section: Level Notebooks

Folder 42 December 1868-August 1872
Folder 43 August 1872-May 1878
Folder 44 June 1878-August 1884
Folder 45 August 1884-August 1892

Section: Observatory Notebooks

Folder 46-47 C.L. Parker July 1870-January 1872
Folder 48 Samuel S. Strassner and A.E. Frost, January 1872-December 1872
Folder 49 A.E. Frost, January 1873-January 1874
Folder 50-51 A.E. Frost, March 1874-December 1875
Folder 52 A.E. Frost and R.F. Hall, July 1876-January 1877

Section: Wastebooks

Folder 53 James Keeler, 1881-1882
Folder 54 Alfred B. Selir, 1883
Folder 55-56 James Page 1887-1888

Section: Yearbooks

Box 62
Folder 57-72 1869-1884

Box 63
Folder 73-79 1885-1891

Box 64
Folder 80-88 1892-1900

Section: Miscellaneous

Box 65
Folder 89-91 Address Books
Folder 92 Character of the Defractory at the Focus of a Telescope
Folder 93 Constants
Folder 94 Heat Book
Folder 95 Least Squares
Folder 96 Miscellany
Folder 97 Optical Notes
Folder 98 Photography
Folder 99 Photometric Observations
Folder 100 Time by Single Altitudes of the Sun
Folder 101-105 Unititled

Box 66
Folder 106-107 Unititled

Subseries 2. Drawings

Section: Sunspots

Box 67
Folder 108 February 1873-December 1876

Box 68
Folder 109 January 1877-December 1880, 1882

Box 69
Folder 110 A Typical Sunspot December 23-24, 1873
Oversize 111 Untitled Drawing by Langley, 1873
Oversize 112 Original Pencil Drawing, March 5-7, 1873
Folder 113 Original Pencil Drawing, December 24, 1873

Section: Mars

Folder 114 Drawings of Mars and of Schiaparalli Globe showing Opposition of 1892, by James Keeler
Oversize 115 Outline Drawing of Mars, by Keeler, August 17-September 17, 1892

Section: Jupiter

Folder 116 Circle Cut to Scale with the Dimensions of Jupiter Written, no date
Oversize 117 Copy of Professor Keeler's Drawings of September 17, 1891, by Frank Schlesinger, no date

Section: Saturn

Folder 118 Circle Cut Outs to Scale of Saturn and her Rings with Dimensions Written, no date

Series VIII. Graphic Materials, 1878-1910

Subseries 1. Mechanical Drawings

Section: Samuel Langley

Oversize 1 Design for an Integrating A[?] Nets, 1886
Sketch of Whirling Table for Flying Tests, from Langley Letterbook #3
Sifting Train, Solar Lunar Spectrum, Figure 1
Illustrating Principal of Transformation of Information from the Prismatic to the Normal Spectrum
The Infra-Red Solar Spectrum of a 60 Rock-Salt Prism

Section: F.W. Very

State of the Sky 1878-1879
Curve d=f(2) for the Hastings Rock Salt Prism
Curves Showing the Effect of Atmospheric Absorption on the Distribution of Energy in the Spectrum of the Higher Prism

Section: J.E. Keeler

Sketch of a Design for a Star Spectroscope for the 36-inch Equatorial of the Lick Observatory

Section: John A. Brashear

Alt-Arimuth Mounting for 6 1/2" Comet Seeker, 1887

Section: F.L.O. Wadsworth

Various Designs for Telescopes

Section: Frank Schlesinger

Various Designs for Telescopes; Maps of the Gulf Coast Comet of 1907 and Halley's Comet of 1910, Ursa Major, and Mt. Whitney

Section: New Material Added, 2013

Box 75
Folder 53 13" Telescope Diagrams
Folder 54 Console
Folder 55 Drawings
Folder 56 Electrical
Folder 57 Telescope
Folder 58 Thaw Console
Folder 59 Thaw Shutter

Subseries 2. Notes and Research (New Material Added, 2013)

Box 76
Folder 1 "Barnard's Star" - Peter Van de Kamp, 1975
Folder 2 Cards - Catalogues
Folder 3 Celestial Mechanics
Folder 4 Colloquium Notes, 1969-1970
Folder 5 Consultation - Notes
Folder 6 Dante
Folder 7 Spectroscopic Orbit
Folder 8 Drafts and Scraps
Folder 9 Error Theory
Folder 10 Material taken from file called "First Drafts"
Folder 11 Focal Curve of Thaw Telescope
Folder 12 Graphs on Curvature
Folder 13 IGY Satellite
Folder 14 Kapteyn-Van Rhijn equation
Folder 15 Keeler Telescope - Thermal Response
Folder 16 Mellon Spectrograph - Focal Plane
Folder 17 Mellon Spectrograph - Line Curvature
Folder 18 Membrane Problem
Folder 19 Navigation
Folder 20 Material from file entitled "Old Measuring Engine"
Folder 21 Optics
Folder 22 Plate Information and Records, 1900-1934
Folder 23 Reductions - Spectrograph
Folder 24 Sensitometer, 1962
Folder 25 Small Brashear Measuring Engine - notes and measurements
Folder 26 Sunspot Numbers, 1953-1975

Series IX. Publicity, 1893-1902

Box 70
Folder 1 News Releases, 1893-1902

Series X. News Clippings (Miscellaneous), 1907-1947

Folder 2 1907-1947

Series XI. Scrapbooks, 1873-1917

Oversize 1 Contains Newsclippings on Langley, 1873-1898
Oversize 2 Commonplace Book, 1895-1917

Series XII. Organizations and Societies, 1899-1960

Subseries 1. Astronomical Society of Pittsburgh

Folder 3 Constitution
Folder 4 Checkbook

Subseries 2. American Astronomical Society

Folder 5 Minutes of the Council (President's Copy), 1899-1917
Folder 6 Minutes, 1936-1939
Folder 7 Programs of Meetings, 1912, 1937-1941
Folder 8 Meeting at Pittsburgh, April 18-21, 1960
Folder 9-11 Correspondence, 1956-1960
Folder 12 Lectures, Radio Astronomy
Folder 13 Lectures, Sub-Dwarf Stars
Folder 14 Financial Information

Subseries 3. National Science Foundation 2013

Scope and Content Notes:

New Material Added, 2013

Box 76
Folder 28 NSF Proposal, December, 1954

Kiewiet de Jonge, Joost H. "Application for a Grant for Scientific Research in Astronomy". December, 1954

Folder 29 NSF Proposal, January, 1955

Wagman, N.E. "Application for a Grant to Provide Quipment for the Observation and Study of Spectroscopic Binaries at the Allegheny Observatory". January, 1955

Folder 30 NSF Proposal, November, 1956

Wagman, N.E. "Application for a Grant to Provide Equipment for the Observation and Study of Spectroscopic Binaries at the Allegheny Observatory". November, 1956.

Folder 31 NSF Final Reports on Grants G-2372 and G-3948, 1956
Folder 32 NSF Proposals, 1961,1965,1966,1968

Kieweiet de Jonge, Joost H. "Application for a Grant to Provide Equipment and to Support Additional Personel Needed in the Study of Spectroscopic Binaries at the Allegheny Observatory". August,1961.

Wagman, N.E. "Application for a Grant to Support the Observation and Study of Spectroscopic and Astrometric Binaries at Allegheny Observatory". November, 1965.

Wagman, N.E. "Application for a Grant to Support a Continuation of the Program of Observation and Study of Spectroscopic and Astrometric Binaries at the Allegheny Observatory". December, 1966.

Wagman, N.E. "Application for a Grant to Support a Continuation of the Program of Observation and Study of Spectroscopic and Astrometric Binaries at the Allegheny Observatory". March, 1968.

Folder 33 NSF Proposals, 1968 - 1971

Wagman, N.E. "Application for a Grant to Support a Continuation of the Program of Observation and Study of Spectroscopic and Astrometric Binaries at the Allegheny Observatory". March, 1968.

Wagman, N.E. "Application for a Grant to Support a Continuation of the Program of Observation and Study of Spectroscopic and Astrometric Binaries at the Allegheny Observatory". April, 1970.

Folder 34 NSF Proposal, March 12,1973

Kiewiet de Jonge, Joost H. "A Proposal to Help Support a New Effort to Significantly Improve Existing and Future Allgeheny Parallaxes, Sept. 1, 1973 - Aug. 31, 1974". March 12, 1973.

Folder 35 NSF Final Reports, 197-1969

Subseries 4. Extrasolar Planetary Foundation

Scope and Content Notes:

New Material Added, 2013. First meeting in 1980, the Extrasolar Planetary Foundation was led by George Gatewood, director of the Allegheny Observatory. As a non-profit organizaton, it's goal was to "promote, foster, sponsor and support astronomical research in the detection and study of extrasolar plnatery systems." Today it remains focused on these same goals.

Folder 36 Extrasolar Planetary Foundation - Goals, By Laws, Minutes, Agendas
Folder 37 Extrasolar Planetary Foundation - Correspondence
Folder 38 Extrasolar Planetary Foundation - Press Releases, Publicity
Folder 39 Extrasolar Planetary Foundation - Memos
Folder 40 Extrasolar Planetary Foundation - Finances

Subseries 5. Other Organizations

Box 76
Folder 27 National Research Council Questionaire
Folder 41 IAU BE Star Cooperation, 1961-1962
Folder 42 Amatuer Astronomers Association of Pittsburgh
Folder 43 U.S. Naval Observatory - Allegheny Observatory Use Agreement
Folder 44 U.S. Naval Observatory - Observatory Questionaire
Folder 45 Pittsburgh Bicentennial Commision
Folder 46 Baldwin-Whitehall School District

Series XIII. Publications, 1870-1975

Subseries 1. Monographs

Box 71
Folder 1 Oxford University Examination Responses, James Parker and Co.: London, Trinity Term, 1870
Folder 2 Annals of the Astronomical Observatory of Harvard College, vol.3, John Wilson Son; Cambridge, MA, 1876

Section: New Material Added, 2013

Folder 47 "Researches on Solar Heat and Its Absorption by the Earth's Atmoshphere"

  • Langley, Samuel Pierpoint. Researches on Solar Heat and its Absoprtion by the Earth's Atmosphere. A Report of the Mount Whitney Expedition. Government Printing Press; Washington. 1884.

Subseries 2. Pamphlets

Box 72
Folder 3-7 Computing, Pamphlets and Catalogs on Computing Machines, 1906-1939
Folder 8-13 Optical Equipment, Pamphlets and Catalogs, 1910-1939

Section: New Material Added, 2013

Folder 48 American Design Components 3-72 Guidebook
Folder 49 Astro-Mechanics Inc.
Folder 50-51 Boller-Chivens
Folder 52 Calculators
Folder 53 Comparators
Folder 54 Dark Room catalogues
Folder 55-56 David W. Mann Company
Folder 57 Digitzer
Folder 58 Grant Instruments
Folder 59 Grant - Legal
Folder 60 Grant Machine - Manual
Folder 61 Hewlett-Packard 2114A Computer Manual

Box 77
Folder 1 Hollow Cathode Tubes
Folder 2 Instrumentation at Astronomical Observatory
Folder 3 Keeler - Telescope
Folder 4 Magnetic Counters
Folder 5 Measuring Equipment
Folder 6 Measuring Systems
Folder 7 Optical Equipment Brochures
Folder 8 Optical Instruments/Accessories
Folder 9-11 PDP Computers
Folder 12 Photomultiplier Tubes
Folder 13 Projection Measuring Lens correspondence
Folder 14 Remote Job Entry
Folder 15 Shaded Pole Motors Blower Wheels
Folder 16 Sorbus
Folder 17 Spectrograph
Folder 18 Spitz Planetarium
Folder 19-21 Telescopes
Folder 22 Westing House Documents

Subseries 3. Reprints and Scholarly Papers

Folder 23 Allegheny Reprints

Wagman, N.E. "A Large Lens Gets a Face Lifting." 1945.

Wagman, N.E. "Update." in from The Astronomical Journal 67, No. 9, November 1962.

Wagman, N.E. "Update." in The Astronomical Journal 68, No. 9, November 1963.

Wagman, N.E. "Update." in The Astronomical Journal 70, No. 9, November 1965.

Beardsley, W.R. et al. "Photographic determinations of the parallaxes of 25 stars with the Thaw refractor." Repinted from the Astronomical Journal, Vol. 78, No. 1. February 1973.

Beardsley, W. R. "Astrometric-Spectroscopic Techniques of Double Stars with Particular Application To γ Geminorum." Reprinted from IAU Symposium No. 30, 1967. Birkenhead: Willmer Brothers Limited, 1967.

Bartko, Frank and R. A. Hanel. "Non-Gray Equilibrium Temperature Distributions Above the Clouds of Venus." Reprinted from The Astrophysical Journal, Vol. 151, January 1968.

Beardsley, Wallace R. "Astrometric-Spectroscopic Triple System Mizar B." Reprinted from The Astronomical Journal 69, No. 8, October 1964.

Vaerewyck, Eugene G. and W.R. Beardsley. "Motion of Fourteen Stars in the Orion Nebula Cluster." Reprinted from The Astrophysical Journal, No. 182, May 15 1973.

Gatewood, George. "An astrometric study of Lalande 21185." Reprinted from The Astronomical Journal, Vol. 79, No. 1, January 1974.

Gatewood, George and Alan L. Behall. "On the nature of the triple-star system 13 Ceti." Reprinted from The Astronomical Journal, Vol. 80, No. 12, December 1975.

Gatewood, George and Jan Paul Dabrowski, "On the Trigonometric Parallaxes of Several Subdwarf Stars." Gatewood, George. "An Astrometric Study of Kuiper 84 (BD + 4°3562)."

Kamper, Karl W. Jr. "Parallax and orbit for the suspected subluminous binary 2 Andromedae." Reprinted from The Astronomical Journal, Vol. 79, No. 1, January 1974.

Kiewiet de Jonge, Joost H. "On the Relationships Between the Frequency Functions of Stellar Velocities." Reprinted from The Proceedings of the National Academy of Sciences, Vol. 34, No.12, December 1948.

Kiewiet de Jonge, Joost H. "Three-star Position Tables for Air Navigation." Reprinted from The Journal of the Institute of Navigation, Vol.5, No.1, January 1952.

Kiewiet de Jonge, Joost H. "Testing A 100-inch Mirror." Written for American Optical, Date Unknown. Kiewiet de Jonge, Joost H. "Notes on the Interpretation of Astigmatic Coefficients as Derived from a Hartmann Test Analysis." Written for Owens-Illinois, January 28, 1969.

Schlesinger, Frank. "A Simple Method for Adjusting the Polar Axis of an Equatorial Telescope." in Miscellaneous Scientific Papers of the Allegheny Observatory, Vol. 2, No. 1. Reprinted from Popular Astronomy, Northfield Minnesota, 1911.

Lippincott, Sarah Lee and Nicholas E. Wagman. "Parallax and Orbital Motion of the Astrometric Binary α Ophiuchi from Plates Taken with the Allegheny 30 in. Thaw Refractor and the Sproul 24-in. Refractor." Reprinted from The Astronomical Journal, Vol. 71, No. 2, March 1966.

Folder 24 "Accuracy of Radial Velocities Determined with Fiber Optic Electrostatic Image Tube"

Beardsley, W.R. et al. "Accuracy of Radial Velocities Determined with Fiber Optic Electrostatic Image Tube." Reprinted from Publications of the Allegheny Observatory of the University of Pittsburgh, Vol. 7, No. 7, 1969.

Folder 25 "Copernicus"
Folder 26 "Recording of Star Spectra with a Fiber Optic Electrostatic Image Intensifier"

Hansen, J.R., Joost H. Kiewiet de Jonge and W.R. Beardsley. "Recording of Star Spectra with a Fiber Optic Electrostatic image Intensifier." Reprinted from Image Technology, August/September, 1969.

Folder 27 "The Astrometric Standard Region in Praesepe (M44)"

Russell, Jane Lorene. "The Astrometric Standard Region in Praesepe (M44)." Submitted to the Graduate Faculty of Arts and Sciences in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy, University of Pittsburgh, 1976.

Folder 28 "Corrections to Observed Frequency Distributions"

Bok, Bart J. and Joost H. Kiewiet de Jonge. "Corrections to Observed Frequency Distributions." Cambridge, Massachusetts, December 10, 1949.

Folder 29 "The Effect of a Flattened Earth on the Motion of Artificial Satellites in Near Earth Orbit"

Stein, John W. "The Effect of a Flattened Earth on the Motion of Artificial Satellites in Near Earth Orbit." December 7, 1972.

Folder 30 "An interative technique for the rectification of observed distributions"

Lucy, L. B. "An iterative technique for the rectification of observed distributions." Reprinted from The Astronomical Journal, Vol. 79, No. 6, June 1974.

Folder 31 "Magnetic Reversals of the Earth As Affected by its Gyrodynamical Stability"

Allen, James B. "Magnetic Reversals of the Earth as Affected by its Gyrodynamical Stability." September 12, 1974.

Folder 32 "On the Absolute Magnitudes of the A-Type Stars"

Kiewiet de Jonge, Joost H. "On the Absolute Magnitudes of the A-Type Stars." A Thesis Submitted in Partial Fulfillment of the Requirement for the Degree of Doctor of Philosophy, Cambridge, Mass: Harvard University, May 1, 1954.

Folder 33 "On the Steady Flow of Gas From the nuclei of Seyfert Galaxies"

Wolfe, Arthur M. "On the Steady Flow of Gas From the Nuclei of Seyfert Galaxies." Reprinted from The Astrophysical Journal, Vol. 188, No. 2, March 1, 1974.

Folder 34 "Present and Future Effects of Mercury Vapor Lighting on Astronomical Research"

Breakiron, Lee and Jane Russell. "Present and Future Effects of Mercury Vapor Lightning on Astronomical Research." for Astronomy 232, October 1971.

Folder 35 "A Proposal to Form An Astrometric Instrument Definition Team for the Large Space Telescope"

Beardsley, Wallace R. "A Proposal to Form an Astrometric Instrument Definition Team for the Large Space Telescope." February 23,1973.

Folder 36 "A Proposal to Survey Nearby Stars for the Perturbative Effects of Extrasolar Planetary Systems, January 1, 1976 - December 31, 1976."

Gatewood, George D. "A Proposal to Survey Nearby Stars for the Perturbative Effects of Extrasolar Planetary Systems, January 1, 1976 - December 31,1976." July 9, 1975.

Folder 37 "Recent Research on the Third Integral of Motion"

Zajdel, T.T. Jr. "Recent Research on the Third Integral of Motion." for Celestian Mechanics, Astronomy 218. April 6, 1971.

Folder 38 "A Summary of the Work of Percival Lowell"

James, Hayes. "A Summary of the Work of Percival Lowell." Astronomy 218.

Folder 39 "Tidal Interactions and Spin-Orbit Coupling"

Breakiron, Lee "Tidal Interactions and Spin-Orbit Coupling." for Celestial Mechanics, April 12, 1971.

Series XIV. Correspondence (Miscellaneous), 1881-1900

Scope and Content Notes:

Series XIV contains miscellaneous correspondence from the individuals at Allegheny Observatory. The (?) denotes that the author or receipiant is illegible or unknown.

Box 73
Folder 1 To Prof. George Davidson, ? From J.J. Stewart Wells, Fargo Co's Express, Lone Pine, CA. Discusses Davidson's planned trip up Mt. Whitney in California July 6, 1881
To ?. From B.S. Hillard, Monroeville, AL. Discusses train arrivals in Monroeville and the cost of lodging, ais, May 4, 1890
To ?. From ?, Clark University, Worchester, MA. Requests information on insulated wires for an article on which he is working, ALS, August 1891
To Penn Sharpe Manufacturing Co., ?. From?, Clark University, Worcester, MA. Requests an order for a worm, AL, October 16, 1891
To Harry Harrer, esquire, Allegheny Observatory. From?, Harvard College Observatory, Cambridge, MA. Informs him of his unsuccessful search for a comet about which Harrer had mentioned to him previously, ALS, September 5, 1896
To Frank Thompson, first vice-president, Pennsylvania Railroad, Philadelphia, from Benjamin Thaw, Pittsburgh. Letter gives historical background on Samuel Langley's work on standardized time, Photocopy, April 30, 1896
To Henry Harrer, Allegheny Observatory, from Hamilton Holt, editor of The Independent, New York. Request manuscript of an article by Harrer, TLS, March 24, 1900
To Ms. Munscher, ? from E.A. Strong, ? Discusses longitude of Grand Rapids, ALS, no date

Series XV. History, 1912-1987

Scope and Content Notes:

Series XV contains histories of the Allegheny Observatory. All of the known authors are listed. If the author is not listed, he/she is unknown.

Folder 1 The Allegheny Observatory of the University of Pittsburgh, [c. mid 1950s] by Theordora M. Lauterbach
Folder 2 The Allegheny Observatory, [c. mid 1910s]
Folder 3 Data Relating to the History, Organization, and Activities of the Allegheny Observatory of the University of Pittsburgh, [c. 1930-37]
Folder 4 Allegheny Observatory, 1958 by Lee Sellars. Also, includes a letter to Sellers from Director Wagman suggesting small changes in his manuscript.
Folder 5 Allegheny Observatory of the University of Pittsburgh: Data presented for consideration if the Commission on Justifications of Higher Education, Middle States Association of Colleges and Secondary Schools, 1952
Folder 6 Pittsburgh's Eye on the Universe, Allegheny Observatory, from Equitable News, May-June, 1975
Folder 7 Astronomy in Pittsburgh, from The Presbyterian Banner, September 5, 1912
Folder 8 Copy of Act of Incorporation
Folder 9 Copy of Deed to Observatory Land
Folder 10 Speech on Observatory given by Dr. Holland, no date
Folder 11 Notes on Observatory History
Folder 12 Dedication of the New Observatory Building, 1912
Folder 13 Program from the dedication of the new observatory
Folder 14 Speech given by Chancellor McCormick at the dedication of the new observatory building
Folder 15 Speech given by, ?, President of the Astronomical and Astrophysical Society of America at the dedication of the New Observatory Building
Folder 16 Invitation list for dedication
Folder 17 Invitation for dedication
Folder 18 Subscription solicitation for dedication
Folder 19 Romancing the Stars, by David A. Fryxell, Pitt Magazine, July 1987
The Allegheny Observatory of the University of Pittsburgh, pamphlet, 1985
The Wandering Stars of Allegheny, by Roger Sinnot, Sky Telescope, October, 1987

Series XVI. Photographs, 1886-1922

Scope and Content Notes:

Series XVI contains photographic prints and negatives (mainly glass plates) of the Observatory, along with personal photography of some of the astronomers. The prints, found in Boxes 16-17, are mostly of the negatives that are part of the collection. Some of these photographs have been scanned and are available online.

Subseries 1. Photographic Negatives

Section: Original Allegheny Observatory

Section: Exterior Views

Box 1
Folder 1 Original Allegheny Observatory
Folder 2 Original Allegheny Observatory building (George W. Tea, photographer: 1886)
Folder 3-4 Old Allegheny Observatory, front view (George W. Tea, photographer: 1886)
Folder 5-9 Original Allegheny Observatory

Section: Interior Views

Folder 10 Seat ladder from Fitz telescope
Folder 11 13 inch refractor, Allegheny Observatory
Folder 12 13 inch refractor (Fitz)
Folder 13 16 inch Wolf doublet mounted on 13 inch Allegheny Observatory Equatorial (R.R.M. Thorne, photographer)

Section: Observations and Research

Folder 14-15 Sunspot drawing, S.P. Langley
Folder 16 List of the principal memoirs and articles on scientific research conducted at the Allegheny Observatory, 1869-1893

Section: Second Allegheny Observatory

Section: Exterior Views

Folder 17 Keeler's proposed plan for the Allegheny Observatory (1895)
Folder 18-19 Proposed designs for new Allegheny Observatory
Folder 20 Allegheny Observatory construction site preparation (R.R. M. Thorn, photographer: June 23, 1900)
Folder 21-22 Allegheny Observatory construction, foundation work (R.R.M. Thorne, photographer: July 17, 1900)

Box 1a
Folder 1 Allegheny Observatory construction (R.R.M. Thorne, photographer: July 17, 1900)
Folder 2 Allegheny Observatory construction (R.R.M. Thorne, photographer, July 28, 1900)
Folder 3 Allegheny Observatory construction, view of wall erection (R.R.M. Thorne, photographer: July 28, 1900)
Folder 4 Allegheny Observatory construction, wall erection (R.R.M. Thorne, photographer: August 25, 1900)
Folder 5 Allegheny Observatory construction, stone laying (R.R.M. Thorne, photographer: October 20, 1900)
Folder 6-18 Allegheny Observatory construction

Box 2
Folder 1-3 Allegheny Observatory construction
Folder 4 View of Allegheny Observatory before completion of domes
Folder 5 Allegheny Observatory construction front elevation
Folder 6 Allegheny Observatory construction, general view of scaffolding
Folder 7 Allegheny Observatory construction, scaffolding
Folder 8 Allegheny Observatory
Folder 9 Allegheny Observatory, front view
Folder 10 Allegheny Observatory, showing transit house, (lantern slide)
Folder 11 Front view of Allegheny Observatory
Folder 12 Front view of Allegheny Observatory, (Frank Jordan, photographer; positive image).
Folder 13 Southeast view of Observatory, (Positive image)
Folder 14 Observatory grounds
Folder 15-16 Observatory grounds, looking west
Folder 17 Path to Observatory by Keeler dome, (March 3, 1924)
Folder 18 From roof of Allegheny Observatory, looking west
Folder 19 Group on roof of Allegheny Observatory

Section: Interior Views

Box 3
Folder 1 Hallway, Allegheny Observatory
Folder 2 Lecture hall, Allegheny Observatory
Folder 3-4 Director's Office, Allegheny Observatory
Folder 5 Library, Allegheny Observatory
Folder 6 Urania window
Folder 7 Statue of John A. Brashear
Folder 8 Allegheny Observatory shop
Folder 9 Allegheny Observatory shop, from south
Folder 10 Allegheny Observatory shop, showing part of large planer
Folder 11 Sector case and mount on dome power console
Folder 12 Worn-out 8" dome guide wheels

Section: Equipment

Folder 13-14 Porter Spectrograph
Folder 15 Head of Porter Spectrograph, (November 14, 1913)
Folder 16 Slit of Porter Spectrograph
Folder 17 Small Spectrograph and accessories
Folder 18 Infrared Spectrograph
Folder 19 Spectrograph
Folder 20 Spectrograph diagram (interferometer grating)
Folder 21 Interferometer grating spectrograph

Box 4
Folder 1 Interferometer measuring attachment, (January 1929)
Folder 2 Blink comparator, from left
Folder 3 Blink comparator, from right
Folder 4 Burns' comparator
Folder 5 Zeiss comparator of the Allegheny Observatory
Folder 6 Riefler clock
Folder 7 Ordinary arc
Folder 8 Vacuum arc
Folder 9 Vacuum arc, bell off
Folder 10 Hilger siderostat
Folder 11 Galv. Refractometer, Chas. A. Francis, U. of C.
Folder 12 "G" refractometer, Chas. A. Francis, U. of C.
Folder 13 Parallax measuring machine, (April 1, 1914)
Folder 14 Measuring engine
Folder 15 Measuring engine, from left, (April 1, 1914)
Folder 16 Long screw measuring engine
Folder 17 Gear and vernier scales of Burns' measuring engine
Folder 18 Large measuring engine, (October 13, 1926)
Folder 19 Comparison measuring engine
Folder 20 Brashear measuring engine

Box 5
Folder 1 Brashear measuring engine
Folder 2 Brashear plate holder
Folder 3 Brashear device
Folder 4 Instrument: John A. Brashear Co., Ltd.
Folder 5 Instrument: John A. Brashear
Folder 6-9 Instrument

Section: Thaw Telescope

Folder 10 Thaw lens on grinding table at Brashear's shop, (May 8, 1914)
Folder 11 30" disc on grinding table, (May 8, 1914)
Folder 12 Glass discs and scrap after cutting
Folder 13 30" disc (flint), (May 8, 1914)
Folder 14 30" discs with cases before grinding
Folder 15 Thaw lens finished; Dr. Schlesinger and Mr. McDowell (August 3, 1914)
Folder 16 Thaw mounting construction (castings for pier made in the Rosedale Foundry machined by the Wilson Snyder Co.)
Folder 17 Thaw mounting construction; head in position
Folder 18 Thaw mounting
Folder 19 Thaw lens ready to be installed in tube
Folder 20 Thaw Telescope objective end, (July 7, 1915)
Folder 21 Thaw Telescope, (July 7, 1915)

Box 6
Folder 1 Thaw Telescope
Folder 2 Thaw plate holder and eyepiece arrangement
Folder 3 3" camera on Thaw tube
Folder 4 Dr. F. C. Jordan at Thaw Telescope
Folder 5 Thaw plaque
Folder 6-7 Thaw Telescope

Section: Other Telescopes

Folder 8 Transit telescope, Allegheny Observatory
Folder 9 Zenith telescope

Section: Observations

Folder 10 Moon (January 9, 1915)
Folder 11 Moon (January 25, 1915)
Folder 12 Moon (January 28, 1915)
Folder 13-15 Moon
Folder 16 Pleiades (December 7, 1918)

Section: People Associated with the Allegheny Observatory

Section: Individuals

Folder 17 Samuel P. Langley: from Scientific American, Issue of August 29, 1887
Folder 18 Dr. Curtis (May 31, 1914)
Folder 19 Dr. Meggers

Box 6a
Folder 1    Mr. Daniel at the telescope. (November 14, 1920)
Folder 2 F.C. Jordan at the telescope (November 14, 1920)
Folder 3 F.C. Jordan at the telescope
Folder 4 F.C. Jordan at 40" telescope
Folder 5-7 Dr. Kievin Burns

Section: Groups

Folder 8 Group on Allegheny Observatory steps, showing Shapeley on left

Box 7
Folder 1 Steps of Allegheny Observatory: Plaskett, Eichelberger, Jordan, Schlesinger, Pickering, Brashear, Thaw, Daniels
Folder 2 Astronomical Society, group photo.

Section: John A. Brashear

Section: Portraits

Folder 3 John A. Brashear
Folder 4 John A. Brashear (Copy: May 4, 1920)
Folder 5 John A. Brashear

Section: Work

Folder 6 Brashear Co. Shop (May 8, 1914)
Folder 7 Brashear's optical shop
Folder 8 6" equatorial for Mt. Pleasant School by Brashear

Section: Personal Photography of Frank C. Jordan

Section: Family, Friends

Folder 9 Baby, at 10 hours old (F.C. Jordan, photographer: July 19, 1898)
Folder 10 Boy and wagon (July 19, 1900)
Folder 11 Boy (May 24, 1901)
Folder 12 Boy (6:00 P.M. June 3, 1901)
Folder 13 Family group at Maplewood (1908)
Folder 14 Hattie at Picnic, Decoration Day (1909)
Folder 15 Jordan house, 49 Riverview Ave.
Folder 16 Jordan house, (north side)
Folder 17 Jordan house, (south side)
Folder 18 Jean and Andrew with snowman (1910)
Folder 19 Interior, F. Jordan dining room (J.H. Jordan, photographer)
Folder 20 Interior, F.C. Jordan parlor (J.H. Jordan, photographer)
Folder 21 Mr. And Mrs. Frank C. Jordan on porch of home (Lantern slide)
Folder 22 Group at grandfather Craig's

Box 8
Folder 1 House, 49 Observatory Ave. (May 30, 1912)
Folder 2 Jordan family on porch, 49 Riverview Ave.
Folder 3 F. Jordan and F.E. Vincent at 49 Observatory Ave. (August 18, 1912)
Folder 4 John William, (August 3, 1912)
Folder 5 Lightning, from rear porch, 49 Observatory Ave. (August 18, 1912)
Folder 6 F.E. Vincent, 49 Observatory Ave. (August 19, 1912)
Folder 7 John William, his dad and mama (November 28, 1912)
Folder 8 John William with father and grandfather
Folder 9 Jean in Martha Washington gown (February 22, 1913)
Folder 10 F.C. Jordan in costume
Folder 11 Hattie and F.C. in old fashioned pose
Folder 12 Campfire girls' play
Folder 13 Campfire girls, Wissahicken Hollow
Folder 14 Group at Sewickley, 706 Nevin Ave
Folder 15 A.J. Good (April 1, 1913)
Folder 16 A.J. Good and mother (April 1, 1913)
Folder 17 H.J. Heckel, Maryville picnic (June 13, 1913)
Folder 18 Jean on Observatory walk (February 25, 1914)
Folder 19 MacIvor and Jordan family and Dr. Martin (June 1914)
Folder 20 The Armstrong house (July 4, 1914)

Box 9
Folder 1 Krom House (July 4, 1914)
Folder 2 The Krom family (July 4, 1914)
Folder 3 The whole family (April 25, 1915)
Folder 4 Andrew as Uncle Sam (May 30, 1915)
Folder 5 Harriet and F.C. Jordan (November 25, 1915)
Folder 6 Thanksgiving, Harriet and F.C. Jordan, Andrew, Will and Sadie (1915)
Folder 7 Group at Aunt Mary Reed's (July 19, 1916)
Folder 8 John William with dog
Folder 9 Interior at Cheswick (February 8, 1917)
Folder 10 John William (1918)
Folder 11 John William at desk (April 21, 1918)
Folder 12 Dr. F. C. Jordan in a silk hat (April 21, 1918)
Folder 13 Group at Beaver (July 19, 1918)
Folder 14 Foundations of house at Beaver
Folder 15 Rosecroft, S.E. front
Folder 16 House at Beaver from southwest (July 22, 1918)
Folder 17 Andrew (July 22, 1918)
Folder 18 Rosecroft
Folder 19 Fireplace at Rosecroft
Folder 20 Family group on porch, Rosecroft, Beaver, PA
Folder 21 Flower garden at Beaver
Folder 22 Group working in flowers at Beaver, PA. (July 25, 1918)

Box 10
Folder 1 Garage at Beaver, PA. (July 25, 1918)
Folder 2 Family group on rocks at Beaver, PA.
Folder 3 M.E. Church, Children's Day (June 11, 19_)
Folder 4 Watson Church, Harvest House decorations (November 2, 1919)
Folder 5 Watson church, Harvest Home decorations (November 2, 1919)
Folder 6 John William at telescope (November 14, 1919)
Folder 7 Jean, Observatory steps (January 1, 1921)
Folder 8 F.C. Jordan. (February 12, 1921)
Folder 9 "Sandy" and Catherine Lamb in living room, Cheswick (March 12, 1921)
Folder 10 "Sandy" Lamb

Section: Views in Ohio

Folder 11 Snow scene, 49 Riverview (March 4, 1922)
Folder 12 Ohio Company's office, Washington St. (F.C. Jordan, photographer: December 29, 1898)
Folder 13 Mound Cemetery, from north, Charlie Carothers on the steps (F.C. Jordan, photographer: December 28, 1898)
Folder 14 Mound Cemetery
Folder 15 University Hall, Ohio State University (August 22, 1899)
Folder 16 Ohio State University grounds (August 22, 1899)
Folder 17 Orton Hall and Biology Lab, Ohio State University (August 22, 1899)
Folder 18 Deaf and Dumb Asylum, Columbus, Ohio (August 23, 1899)
Folder 19 Death Cell, Ohio State Penitentiary
Folder 20 Picnic group at Fredericktown, Ohio (May 30, 1909)
Folder 21 Children fishing, Fredericktown, Ohio (1909)
Folder 22 Indian carvings, Smith's Ferry, Ohio (1909)
Folder 23 Children, East Liverpool, Ohio (1909)

Box 11
Folder 1 Family group on rocks, Smith's Ferry, Ohio (1909)
Folder 2 House and family at East Liverpool, Ohio (1909)
Folder 3 Old Caywood house, Wheeler house (July 19, 1916)
Folder 4 Caywood house, Washington County, Ohio.
Folder 5 Caywood house, Hills P.O.
Folder 6 Marietta and river from Harmer Hill, Ohio
Folder 7 Mill at Beverly, Ohio
Folder 8 House 618, Second St., Marietta, Ohio

Section: Views in Wisconsin

Folder 9 Reflector dome and Lake Geneva, Yerkes Observatory
Folder 10 Lake Geneva, from top of Yerkes Observatory, looking east
Folder 11 Yerkes Observatory
Folder 12 2 foot reflector, Yerkes Observatory.
Folder 13 Yerkes group (1907)
Folder 14 Yerkes group

Section: Views in Colorado

Folder 15-17 Chamberlin Observatory (June 8, 1918)
Folder 18 Mountains from Chamberlin Observatory (June 8, 1918)
Folder 19 Clock at Knob Hill Station, Colorado Springs
Folder 20 Cooke camera at Knob Hill, Colorado Springs
Folder 21 Range south of Pike's Peak, from Knob Hill

Box 12
Folder 1 Pike's Peak and range from Knob Hill (June 9, 1918)
Folder 2-3 Pike's Peak and range (June 9, 1918)
Folder 4 Train on Midland Road, base of Pike's Peak
Folder 5 Engine, Pike's Peak Cog Road
Folder 6 Pike's Peak Cog Road, near half-way house
Folder 7 Looking down along Pike's Peak Cog Road
Folder 8 Pike's Peak Cog Road, ascending curve
Folder 9 Manitou and front range, Pike's Peak region
Folder 10 Geology class at Manitou ready to go up to Lake Moraine
Folder 11 Bald Mountain from Lake Moraine
Folder 12 Williams Canyon, Manitou, Colorado
Folder 13 Rocks in Williams Canyon.
Folder 14 Amphitheater, Williams Canyon, Manitou, Colorado
Folder 15 Pavilion at Manitou, Soda Springs.
Folder 16 Geology class at Seven Falls, South Cheyenne Canyon
Folder 17 View from top of Seven Falls, Cheyenne Canyon
Folder 18 Father and Uncle Spence at top of Seven Falls
Folder 19 South Cheyenne Canyon, Colorado Springs
Folder 20 Family group, South Cheyenne canyon

Box 13
Folder 1 Ice in South Cheyenne Canyon
Folder 2 "Needless," North Cheyenne Canyon
Folder 3 Cheyenne Mountain. (June 9, 1918)
Folder 4 Cheyenne Mountain, from the west
Folder 5 Cheyenne Mountain, from Canyon Park
Folder 6 Valley west of Cheyenne Mountain, Colorado Springs
Folder 7 Plains, Colorado Springs, east from Knob Hill
Folder 8 Plains south of Colorado Springs, Cheyenne Canyon
Folder 9 Family group at cabin, St. Peter's Dome, Colorado Springs
Folder 10 St. Peter's Dome, Colorado Springs
Folder 11 Geology class, Red Rock Canyon, Colorado Springs
Folder 12 Geology class in Garden of the Gods
Folder 13 Gateway, Garden of the Gods
Folder 14 Rocks in Garden of the Gods
Folder 15 Balanced Rock, Garden of the Gods
Folder 16 Rocks in Garden of the Gods (Seal and Bear)
Folder 17 Group in Garden of the Gods, at Siamese Twins
Folder 18 Profile Rock, Garden of the Gods
Folder 19 Rocks in Monument Park, Colorado
Folder 20 "Quaker Wedding," Monument Park, Colorado
Folder 21 Cox house and group, Colorado Springs
Folder 22 High School, Colorado Springs

Box 14
Folder 1 On Tennessee Pass, near Leadville, Colorado

Section: Views in the West

Folder 2 Along the Union Pacific (March 1900)
Folder 3 Sagebrush plains, Wyoming or Idaho
Folder 4 Sacramento State House
Folder 5 Ground, State House, Sacramento

Section: Various Views

Folder 6 Oil field, Moore's Junction (F.C. Jordan, photographer: December 30, 1898)
Folder 7 Houses at toll gate, 9 miles from government camp (6 A.M. September 2, 1900)
Folder 8 Multiple lightning flash (F.C. Jordan photographer: August 27, 1904)
Folder 9 208 Club
Folder 10 Mr. Barnhard's observatory (May 4, 1907)
Folder 11 Bi-plane
Folder 12 Red Cross nurse at "Flu" hospital
Folder 13 Indian Mound at Oakmont, beginning of operations (October 4, 1895)
Folder 14 Indian Mound Oakmont (October 4, 1895)
Folder 15 Indian Mound Oakmont, from west (October 4, 1895)
Folder 16 View toward Schoenberger Iron Works in Strip District, from base of P. Ft. W. C. Ry. Bridge (c. 1900)
Folder 17 Pittsburgh fireworks (July 4, 1901)
Folder 18 Phipps Conservatory, North Side
Folder 19 208 Club

Box 15
Folder 15 Perry High School, from Perrysville Ave.
Folder 2 Looking west above Perrysville Ave., up plank road.
Folder 3 Backyard telescope
Folder 4 Residence of Major Speer, Oakmont, Pa., October 4, 1895
Folder 5-6 Parlour, Residence, JEK
Folder 7 Austin Bluffs, Colorado Springs

Section: New Material Added, 2013

Box 18
Folder 16 Thaw Refracter Negatives, March 9, 1972

Subseries 2. Photographic Prints

Box 16
Folder 1-6 Dr. Brashear
Folder 7 Dr. Brashear's Wife
Folder 8 Dr. Brashear's Mother
Folder 9 Dr. Brashear with Alexander Graham Bell and Others
Folder 10 Brashear Memorial Subscription Book Signing
Folder 11-12 Allegheny Observatory
Folder 13 First Photograph of the Nebula in Orion
Folder 14 Photograph of the Nebula in Orion
Folder 15 William Thaw (negative available)

Box 17
Folder 1 Miscellaneous Allegheny Observatory Prints
Folder 2 Miscellaneous Instruments
Folder 3 Miscellaneous Individuals
Folder 4 Miscellaneous Observations
Folder 5 Various Views

Section: New Material Added, 2013

Box 18
Folder 1-2 30 inch Keeler Telescope
Folder 3 Thaw Telescope (No. 3123A)

Photographs of the Thaw Telescope taken by George Plaetvich. Date Unknown.

Folder 4 Telescope Components, March, 1973

Photographs taken by George Vargo, March 1973.

Folder 5 Photograph used in Publication, 1968

Photograph of Researchers in front of image tubes display, 1968 (?) L-R: Joost H. Kiewiet de Jonge, Wallace R. Beardsley, and J.R. Hansen.

Folder 6-7 Basement - Library Photographs
Folder 8 Gaertner Scientific - M1233 Comparator (A & B)
Folder 9 Grant - Measuring Machines
Folder 10 Grant Data System
Folder 11 Riddell Scientific Instrument - Williams Bay, Wis.
Folder 12 Small Brashear Measuring Engine
Folder 13 Iron Spectrum - Vatican Atlas
Folder 14 Spectrum Enlargements
Folder 15 Thaw Dome, August 1972

Photographs of the Thaw Dome with Scaffolding. Taken August 1972.

Series XVII. Student Records, 1960-1977

Access Restrictions:

Access restricted without signed confidentiality agreement.

Box 78
Folder 1 Barrick, John
Folder 2 Breakiron, Lee
Folder 3 Caglayan, Aybars
Folder 4 Engel, Thomas
Folder 5 Fluharty, John R.
Folder 6 Gatewood, George
Folder 7 Gault, Andrew
Folder 8 Gbur, Nicholas J.
Folder 9 Giannini, Judith
Folder 10 Grimble, Ralph E.
Folder 11 Hayes, James C.
Folder 12 Jett, James Eric
Folder 13 Jones, George W.
Folder 14 Kamper, Karl W.
Folder 15 Kimmel, Frank W.
Folder 16 King, Merle
Folder 17 Kipp, Steven
Folder 18 Kirshnawamy, Parvalthi
Folder 19 Lavie, Aharon
Folder 20 Lippert, Kenneth B.

Box 79
Folder 1 Mechler, Gary
Folder 2 Mesrobian, William S.
Folder 3 Mousseau, Robert
Folder 4 Nelson, Robert M.
Folder 5 Olejniczak, Paul J.
Folder 6 Peters, Lawrence E. Jr.
Folder 7 Parise, Ronald Anthony
Folder 8 Parks, Allen D.
Folder 9 Russel, Jane
Folder 10 Schwab, Harry L.
Folder 11 Sprinkle, Thomas G.
Folder 12 Stein, John William
Folder 13 Tepper, Lawrence J.
Folder 14 Trybula, Walter
Folder 15 Urbaniak, John J.
Folder 16 Vaerewyck, Eugene G.
Folder 17 Worek, Thaddeus
Folder 18 Zajdel, Theodore T. J.
Folder 19 Ziska, Eugene R.