Edison Pettit Papers: Finding Aid

Processed by Ronald S. Brashear in March 1998.
The Huntington Library, Art Collections, and Botanical Gardens
Manuscripts Department
1151 Oxford Road
San Marino, California 91108
Phone: (626) 405-2191
Email: reference@huntington.org
URL: http://www.huntington.org
© 1998
The Huntington Library. All rights reserved.


Overview of the Collection

Title: Edison Pettit Papers
Dates (inclusive): 1920-1969
Collection Number: mssPettit papers
Creator: Pettit, Edison, 1889-1962.
Extent: 6 boxes (3,100 pieces)
Repository: The Huntington Library, Art Collections, and Botanical Gardens. Manuscripts Department
1151 Oxford Road
San Marino, California 91108
Phone: (626) 405-2191
Email: reference@huntington.org
URL: http://www.huntington.org
Abstract: This collection contains the papers of astronomer Edison Pettit (1889-1962), who was on the staff of the Mount Wilson and Palomar Observatories. The correspondence is chiefly with other astronomers in the United States and deals with astronomy in general including Pettit's work at Mount Wilson, telescopes, and ultraviolet light research. The rest of the collection is made up of manuscripts, notes, notebooks and printed items.
Language: English.

Access

Open to qualified researchers by prior application through the Reader Services Department. For more information, contact Reader Services.

Administrative Information

Publication Rights

The Huntington Library does not require that researchers request permission to quote from or publish images of this material, nor does it charge fees for such activities. The responsibility for identifying the copyright holder, if there is one, and obtaining necessary permissions rests with the researcher.
According to a note in the papers, all personal correspondence of Edison Pettit (indicated in the contents list as "PETTIT PERSONAL") remains the property of the family and heirs of Edison Pettit. Before the personal property of Edison Pettit may be made available for public research, permission must be obtained from a family member. The Carnegie Observatories, as part of the 1987 letter of agreement, have given the Huntington Library the right to provide permission to publish from the remaining portion of the papers.

Preferred Citation

Identification of item]. Edison Pettit Papers, The Huntington Library, San Marino, California.

Provenance

Deposit, Observatories of the Carnegie Institution of Washington Collection, 1988.

Processing/Project Information

Cataloging of the papers was completed prior to their transfer to the Huntington.

Biographical Note

Edison Pettit (1890-1962) was an astronomer on the staff of the Mount Wilson [and Palomar] Observatories for thirty-five years. An observer and instrumentalist, he was a pioneer in the early fields of infrared and ultraviolet research. His main interest was in the sun but later expanded to include the moon and planets. His collaboration with Seth B. Nicholson on the heat radiation from the planets and moon was the most significant research on these bodies during the first half of the twentieth century.
Edison Pettit was born in Peru, Nebraska on September 22, 1890 (note: for a while, Pettit gave his birth date as September 22, 1889; this error propagated long after Pettit corrected his mistake and consequently obituaries will thus incorrectly give his birth date as 1889). His interest in science grew after he entered the Peru State Normal School where he became the student assistant in the physical laboratory in 1904. One year later he began working in the small observatory at the school. From 1906 to 1907, Pettit was out of school, working at the electric light plant which his father helped organize. Although not in school, Pettit gained a great deal of practical experience. He returned to Normal School and graduated in 1910, but stayed on an extra year and graduated with the first college class at Peru in 1911. After graduation, Pettit obtained a job as a science teacher at Minden, Nebraska, High School until 1914. In 1914, he became instructor in physics and astronomy at Washburn College in Topeka, Kansas. The college had an observatory with an 11-inch refracting telescope and Pettit would use this instrument to observe double stars, comets, and Jupiter. While at Washburn, Pettit would occasionally spend summers at the Yerkes Observatory of the University of Chicago. His growing connection with the staff at Yerkes prompted Pettit to leave Washburn College in 1918 and become a graduate student at the University of Chicago. As a graduate student in astronomy, Pettit was assigned as a student assistant at Yerkes Observatory in Williams Bay, Wisconsin. His chief work at Yerkes centered on the study of solar prominences. During the solar eclipse of June 8, 1918, Pettit was stationed at Matheson, Colorado, and used the 11-inch objective from Washburn College Observatory to photograph the corona. That same year, Pettit met and married another astronomy graduate student at Chicago, Hannah Steele. On May 29, 1919, Pettit observed an incredibly large prominence and was able to follow it through its course. He was able to develop a formula describing the development of the prominence and used this as the basis of his Ph.D. thesis, "The Forms and Motions of Solar Prominences," which was completed in 1920.
During his stay at Yerkes, Pettit came to the attention of the director of the Mount Wilson Observatory, George Ellery Hale. Hale, the former director of Yerkes, offered Pettit a position at Mount Wilson. Hannah Pettit, who obtained her Ph.D. in 1919, was given a job as a computer at Mount Wilson. Shortly after his arrival, Pettit was assigned the task of constructing vacuum thermocouples in order to measure radiation from stars and planets. This work, done in collaboration with Seth Nicholson, was in response to the effort mounted at Lowell Observatory by William W. Coblentz and Carl O. Lampland. After six months, Pettit became adept at constructing the tiny thermocouples and the Mount Wilson astronomers soon caught up with the Lowell workers. Together, Pettit and Nicholson measured the radiation from all types of stars, obtaining their temperatures, diameters, and established the concept of radiometric magnitudes. Using the same instruments, they also calculated the surface temperatures of the planets and the moon. Pettit measured the temperature of the moon during a lunar eclipse, obtaining the rate of cooling and heating by the sun. These data were then used to determine the lunar heat capacity and conductivity. The results of this work were generally confirmed by the Lowell researchers and were quickly accepted by astronomers. The work remained as the basis for all stellar and planetary temperature measurements until the 1960s, when new methods, including planetary fly-bys, replaced the older results.
Another field in which Pettit specialized at Mount Wilson was the study of ultraviolet solar radiation. Using thermopiles, Pettit attempted, beginning in 1924, to study the variability of the solar ultraviolet and at first believed he had found evidence of large variability. After more research, however, it was concluded that the variability was caused by changes in the amount of ozone in the earth's atmosphere and not by changes in solar energy output. The Mount Wilson work was supplemented by occasional trips, beginning in 1930, by Pettit to the Carnegie Institution of Washington's Desert Laboratory in Tucson, Arizona. Pettit's ultraviolet work was of great interest to the medical community as ultraviolet light was being considered as a treatment for tuberculosis and other diseases. There is a great deal of correspondence in the papers relating to such interest in his ultraviolet research.
Pettit's interest in solar prominences continued at Mount Wilson Observatory. Combining his research there with summer trips to Yerkes or the McMath-Hulbert Observatory in Michigan, Pettit eventually published a catalog of all well-observed eruptive prominences. He also started using 16-millimeter motion picture cameras attached to telescopes to photograph solar prominences. These movies were an excellent tool for the study of prominences and were popular items at astronomical gatherings. Among other work that Pettit indulged in was providing consultation to the researchers at the Desert Sanatorium of Southern Arizona and providing materials for the North American Almanac.
Pettit retired from the Mount Wilson and Palomar Observatories in 1955. He stayed at his Pasadena home, working in his private machine shop and observing with the 6-inch Clark refracting telescope that he purchased in Michigan. Much of his time was spent in visiting his wife in the hospital, after she had suffered a severe stroke. In 1961, Hannah Steele Pettit passed away and shortly thereafter, in January 1962, Pettit suffered a stroke. He was forced to move to Tucson to stay with one of his two daughters, Marjorie Pettit Meinel. Not too long after that, however, he suffered a second stroke and passed away on May 5, 1962.

Scope and Content

This collection contains the papers of astronomer Edison Pettit (1889-1962), who was on the staff of the Mount Wilson and Palomar Observatories. The correspondence, containing both incoming and carbons of outgoing letters, is chiefly with other astronomers in the United States and deals with astronomy in general including Pettit's work at Mount Wilson, telescopes and ultraviolet light research. The rest of the collection is made up of manuscripts, notes, notebooks and printed items. The majority of the manuscripts are by Edison Pettit (two are co-written with Seth Barnes Nicholson and there is one abstract by Harold D. Babcock). The manuscripts deal with astronomy including thermocouples, Pettit's ultraviolet research, the Sun, the Moon and telescope lenses. One notable manuscript is a rather lengthy typed manuscript with handwritten edits (facsimile copy) regarding the moon and which is probably written by Edison Pettit (but never published?). There are also Miscellaneous notes related to astronomy in general and more specifically the moon and nebulae including galley proofs for the book Physics and astronomy of the Moon, edited by Zdenĕk Kopal. The twelve Nebular Photometry notebooks in boxes 8 and 9 were kept by Pettit while at work observing the sky. There are also three reprints of articles (one by Pettit). The albums in box 10 include one with photographs (nebulae) but the other three contain handwritten notes and lists kept by Pettit. The collection has several photographs scattered throughout the collection.

Arrangement

Pettit's papers have been arranged, with only minor changes, according to the manner in which they had been found in the attic of Mt. Wilson.
The Pettit Papers consists of the following series:
  • Correspondence, 1920-1946
    • 1920-1924 (Box 1)
    • 1925-1929 (Boxes 2-3)
    • 1930-1932 (Box 4)
    • 1933-1937 (Box 5)
    • 1938-1946 (Box 6)
  • Manuscripts and graphs (Box 6)

Indexing Terms

The following terms have been used to index the description of this collection in the Huntington Library's Online Catalog.  

Subjects

Pettit, Edison, 1889-1962.
Carnegie Institution of Washington.
Mount Wilson and Palomar Observatories -- History -- Sources.
Mount Wilson Observatory -- History -- Sources.
Yerkes Observatory.
Astronomers -- United States -- Archives.
Astronomical observatories -- California -- Wilson, Mount (Mountain)
Astronomy -- Photographs.
Astronomy -- Research.
Astronomy -- United States -- History -- 20th century -- Sources.
Galaxies.
Moon.
Nebulae.
Sun.
Telescopes -- Design and construction -- History -- Sources.
Ultraviolet radiation.

Forms/Genres

Letters (correspondence) -- United States -- 20th century.
Notebooks -- United States -- 20th century.
Photographs -- United States -- 20th century.
Research (document genres) -- United States -- 20th century.

Additional contributors

Abbot, C. G. (Charles Greeley), 1872-1973.
Aitken, Robert Grant, 1864-1951.
Babcock, Harold D. (Harold Delos), 1882-1968.
Bateson, Frank M.
Brooks, Frederick A. (Frederick Augustus), 1895-1967.
Coblentz, William W. (William Weber), 1873-1962.
Frost, Edwin Brant, 1866-1935.
Hale, George Ellery, 1868-1938.
Joy, Alfred H. (Alfred Harrison), 1882-1973.
McMath, Robert Raynolds.
Kopal, Zdeněk, 1914-1993.
Menzel, Donald H. (Donald Howard), 1901-1976.
Nicholson, Seth B. (Seth Barnes), 1891-1963.
Shapley, Harlow, 1885-1972.
Stetson, Harlan True, 1885-1964.
Wright, F. E. (Frederic Eugene), 1877-1953.
American Astronomical Society.
Carnegie Institution of Washington.
International Astronomical Union.
Popular astronomy.


Collection Contents

 

Correspondence

Box 1

1920-1924

Folder 1

A -- Miscellaneous (1920-1924)

Physical Description: 19 items

Charles Greeley Abbot (6); Robert Grant Aitken (5); American Association for the Advancement of Science (1); American Astronomical Society (2); American Radio Tube Works (2); John August Anderson (2); Astronomical Society of the Pacific (1)
Folder 2

B -- Miscellaneous (1920-1924)

Physical Description: 55 items

Ren J Bache (3); Lloyd C. Bagby (4); Baker & Co., Inc. (3); George Banta Publishing Co. (1); Edward Emerson Barnard (1); Storrs Barrows Barrett (7); Bausch & Lomb Optical Co. (10); James G. Biddle (17); Paul Biefeld (4); Herbert Brownell (2); S. M. Brownell (1); Bertram Borden Boltwood (1); John A. Brashear & Co. [see J. B. McDowell Co.]; The Braun Corporation (1)
Folder 3

C -- Miscellaneous (1920-1924)

Physical Description: 23 items

Walter Guyton Cady (2); Edwin Francis Carpenter (1); Central Scientific Co. (4); Major E. B. Colladay [re plans for Eclipse expedition to Fort Rosecrans] (2); Corning Glass Co. (9); Clifford Charles Crump (4); Leland E. Cunningham (1)
Folder 4

D -- Miscellaneous (1920-1924)

Physical Description: 6 items

J. A. Davidson (1); Arthur Louis Day (5)
Folder 5

E -- Miscellaneous (1920-1924)

Physical Description: 3 items

Eimer and Amend Chemical Co. (1); Elgin National Watch Co. (2)
Folder 6

F -- Miscellaneous (1920-1924)

Physical Description: 25 items

[?] Finley (4); Philip Fox (1); Edwin Brant Frost (20)
Folder 7

G -- Miscellaneous (1920-1924)

Physical Description: 14 items

William Gaertner & Co. (5); General Electric Co. (7); Warren Kimball Green (2)
Folder 8

H -- Miscellaneous (1920-1924)

Physical Description: 41 items

George Ellery Hale (1); Asaph Hall, Jr. (5); William Edmund Harper (1); Harper's Magazine [includes correspondence with Ellsworth Huntington] (7); George Russell Harrison (2); Margaret Harwood (5); Russell M. Heath (1); S. G. Hefelbower (1); Henry Heil Chemical Co. (6); Adam Hilger, Ltd. (1); Herbert Percival Hollnagel (3); Herbert Clark Hoover (1); John M. Howie [includes copy letter EP 6 Victor Clifton Alderson] (3); Wilbur Franklin Hoyt [includes photo] (4)
Folder 9

I -- Miscellaneous (1920-1924)

Physical Description: 3 items

Walter E. Inglis (3)
Folder 10

K -- Miscellaneous (1920-1924)

Physical Description: 4 items

C. B. Kazda (1); John J. Kelley (2); Mrs. Elena C. Korthe [sp.?] (1)
Folder 11

L -- Miscellaneous (1920-1924)

Physical Description: 30 items

Oliver Justin Lee (2); The Leeds & Northrup Co. (20); Walter F. Lineberger [includes correspondence with Smithsonian Institution] (6); The Littleton Co. (1); Knut Lundmark (2)
Folder 12

M -- Miscellaneous (1920-1924)

Physical Description: 12 items

J. B. McDowell Co. (2); Donald Howard Menzel (7); John Anthony Miller (1); Robert Andrews Millikan [form letter announcing his leaving Chicago] (2)
Folder 13

North American Almanac Company(1920-1924)

Physical Description: 75 items

Most of the correspondence is with Nile C. Smith.
Folder 14

N -- Miscellaneous (1920-1924)

Physical Description: 12 items

National Association of Broadcasters (1); National Research Council (2); Finley F. Neal (6); Seth Barnes Nicholson (3)
Folder 15

O -- Miscellaneous (1920-1924)

Physical Description: 28 items

Optical Society of America [includes orrespondence with their Journal as well and typed manuscript "The Registering Microphotometer of the Mount Wilson Observatory"] (28)
Folder 16

PETTIT -- PERSONAL (1920-1924)

Physical Description: 52 items

See note in Administrative Information section for permission to use material in the Pettit folders. Carnegie Institution of Washington (11); The Community Chest of Pasadena (1); First National Bank, Lake Geneva, Wisconsin (20); First Trust and Savings Bank (1); Edward J. Fucik, M.D. (1); "Mother" Pettit (1); William M. Pettit (2); Harriet W. Sheppard (1); Sigma Xi (2); Teachers Insurance and Annuity Association (9); War Risk Insurance (1); Wisconsin National Life Insurance Company (2)
Folder 17

P -- Miscellaneous (1920-1924)

Physical Description: 7 items

John S. Paraskevopoulos (1); John A. Parkhurst [includes typed manuscript "The Total Radiation of Variable Stars Observed with the Vacuum Thermocouple at Mount Wilson"] (3); William Henry Pickering (1); Popular Astronomy (2)
Folder 18

R -- Miscellaneous (1920-1924)

Physical Description: 7 items

William F. Rigge (2); John A. Roebling's Sons Co. (2); Henry Norris Russell (3)
Folder 19

S -- Miscellaneous (1920-1924)

Physical Description: 22 items

Science and Invention (2); Science Service (3); Sigma Xi (4); W. T. Skilling (6); Southern California Edison Co. (1); Olenus Lee Sponsler (3); Joel Stebbins (1); The Stupakoff Laboratories (1); Goodwin Deloss Swezey (1)
Folder 20

T -- Miscellaneous (1920-1924)

Physical Description: 5 items

John Torrence Tate (3); George F. Taylor (1); Topeka Transfer & Storage Co. (1)
Folder 21

U -- Miscellaneous (1920-1924)

Physical Description: 5 items

U.S. Radium Corp. (1); Universal Radio & Research Co. (1); University of California, Southern Branch (1); University of Chicago (2)
Folder 22

V -- Miscellaneous (1920-1924)

Physical Description: 2 items

George Van Biesbroeck (2)
Folder 23

W -- Miscellaneous (1920-1924)

Physical Description: 27 items

Western Electric Co., Inc. (6); Westinghouse Electric & Manufacturing Co. (3); Weston Electrical Instrument Co. (2); Helen Whitaker (9); R. M. Wilkie (2); L. W. Wilson (2); Wisconsin National Life Insurance Co. (2); The World Tomorrow (1)
Box 2

1925-1929, A-L

Folder 24

A -- Miscellaneous (1925-1929)

Physical Description: 43 items

Charles Greeley Abbot (17); Walter Sydney Adams (1); Robert Grant Aitken (4); Allyne & Ward (2); American Astronomical Society [Joel Stebbins] (9); Clifford N. Anderson [includes typed manuscript "Correlation of Radio Transmission with Ultra-Violet Radiation and Ozone"] (4); Arrowhead Springs Corp. (1); Atlantic Photo-Co. (3); L. d'Azambuja (2)
Folder 25

B -- Miscellaneous (1925-1929)

Physical Description: 68 items

J. E. Barnard (1); James Barnes (3); Bart Reflector Co., Inc. (3); L. Bastings (2); Louis Agricola Bauer (12); Bausch & Lomb Optical Co. (4); Louis Berman (2); Frances L. (Mrs. Paul) Blatchford (3); Major J. E. Bloom (2); Boehmke Optical Co. (2); John D. Boon (3); William T. Bovie (1); Jacques Boyer (1); Frederick Sumner Brackett (6); The Braun Corp. (2); Julius Arthur Brown (6); Mrs. Margie Brown (1); Herbert Brownell (6); W. Brunner [includes copy letter from W. E. Bernheimer] (2); E. A. Bryant (3); Albert Alfred Buss (4)
Folder 26

C -- Miscellaneous (1925-1929)

Physical Description: 24 items

Jean Cabannes (2); Walter Guyton Cady (1); California Crushed Fruit Co. (2); California Institute of Technology [John August Anderson] (1); E. Calzavara (2); James McKeen Cattell [re search for Secretary of the Smithsonian] (1); Randolph M. Cermak (3); J. W. D. Chesney (1); Sam M. Clark (2); Mrs. William Weber Coblentz (1); Collier's (2); Corning Glass Works (2); J. W. Crabtree (2); A. C. D. Crommelin (2)
Folder 27

The Desert Sanatorium of Southern Arizona, Inc.(1925-1929)

Physical Description: 134 items

Frank C. Balderry; A. M. Busby; Roland Davison; George Earl Davis; W. Paul Holbrook; Daniel Trembly MacDougal; J. A. Sharpe; Creed Taylor; Bernard Langdon Wyatt
Folder 28

D -- Miscellaneous (1925-1929)

Physical Description: 34 items

The Daven Corp. (2); J. E. Davis (1); Henry de Laszlo (1); C. E. Depperman, S.J. (5); Detroit Public Schools, Dept. of Buildings and Grounds (2); City of Detroit, Dept. of Buildings and Safety Engineering (1); G. M. B. Dobson (8); Andrew Ellicott Douglass (3); Philip Drinker (2); Isabel H. Dudley (1); Raymond Smith Dugan (1); E. I. Du Pont de Nemours & Co. (6)
Folder 29

E -- Miscellaneous (1925-1929)

Physical Description: 10 items

Scott R. Edwards (2); Captain William Snyder Eichelberger [U.S. Naval Observatory] (1); Engineers Society of Pasadena (2); John Marcus Evvard (5)
Folder 30

F -- Miscellaneous (1925-1929)

Physical Description: 45 items

Charles Fabry (1); Mary J. Faherty (2); Sampaio Ferraz (2); Fish-Schurmann Corp. (7); John Adam Fleming [American Geophysical Union] (5); William Elmer Forsythe [General Electric Nela Park] (6); The Franklin Institute (2); Edward Elway Free (5); Erwin Finlay Freunldich (1); Julien P. Friez & Sons (1); Edwin Brant Frost (13)
Folder 31

G -- Miscellaneous (1925-1929)

Physical Description: 45 items

The Gaertner Scientific Corp.(15); Frederick Lamont Gates (3); General Electric Co., Research Laboratory (6); Kasson Stanford Gibson (1); Gleason-Tiebout Glass Co. (1); Mrs. Lois K. Godfrey (3); Gooding College Forward Movement (1); Herman Goodman (1); A. Gottlieb (1); C. R. Granberry [includes letters to/from D. T. MacDougal] (4); Henry J. Green (2); B. L. Griffing (4); Mrs. H. F. Grigsby (2); Grimes-Stassforth Stationery Co. (1)
Folder 32

H -- Miscellaneous (1925-1929)

Physical Description: 73 items

Asaph Hall, Jr. (1); L. R. Hafstad (1); Herbert A. Hamm (1); Hanovia Chemical & Manufacturing Co. (23); R. I. Harris (1); Gilbert Havens (2); Earnest W. Hawkes (2); Fred H. Heath (1); Bernard Clifford Hendricks (1); Adam Hilger, Ltd. (1); Leonard Hill (2); Thorfin Rusten Hogness (3); Mrs. C. I. W. Hollister (2); William James Hooper (4); Frank E. Howard (4); William Franklin Hoyt (18); Blythe Hurst, Sr. (6)
Folder 33

I -- Miscellaneous (1925-1929)

Physical Description: 9 items

International Astronomical Union (3); H. J. C. Ireton (1); Clarke Irvine (2); James Edmund Ives [U.S. Public Health Service] (3)
Folder 34

J -- Miscellaneous (1925-1929)

Physical Description: 5 items

Josef J. Johnson (2); Roy Jordan, Inc. (2); Alfred Harrison Joy (1)
Folder 35

K -- Miscellaneous (1925-1929)

Physical Description: 31 items

M. E. Kahler (1); Kay & Burbank Co., Inc. (1); Keese Engineering Co. (1); Norton Adams Kent (2); Herbert Harvey Kimball [American Geophysical Union] (10); P. J. Kipp & Zonen [includes J. J. van Oortmerssen] (5); Alfred Brooker Klugh (6); H. Kobold (1); Harry I. Krakeur [sp.?] (1); Jakob Kunz (3)
Folder 36

L -- Miscellaneous (1925-1929)

Physical Description: 21 items

Claude Jerome Lapp (3); H. J. Larson (3); Francis P. Leavenworth (2); Oliver Justin Lee (2); The Leeds & Northrup Co. (9); The Literary Digest (1); Leonard Benedict Loeb (1)
Box 3

1925-1929, M-Z

Folder 37

M -- Miscellaneous (1925-1929)

Physical Description: 60 items

Daniel Trembly MacDougal (46); Mentore Maggini (2); Charles Frederick Marvin (2); William James Mayo (1); John E. Mellish (3); John Campbell Merriam (3); I. M. Miller (3)
Folder 38

North American Almanac Company(1925-1929)

Physical Description: 56 items

Most of the correspondence is with Nile C. Smith
Folder 39

N -- Miscellaneous (1925-1929)

Physical Description: 35 items

The National Geographic Society (1); National Tuberculosis Association (22); Finley F. Neal (3); Charles F. Neergaard (2); Mary Lawson Neff (3); Seth Barnes Nicholson (2); Hugo Nilson (2)
Folder 40

O -- Miscellaneous (1925-1929)

Physical Description: 13 items

Optical Society of America (10); Oregon Tuberculosis Association (1); F. H. Osler (2)
Folder 41

PETTIT -- PERSONAL (1925-1929)

Physical Description: 20 items

See note in Administrative Information section for permission to use material in the Pettit folders. Carnegie Institution of Washington (10); H. Hallenbeck [re death of George Pettit] (1); A. N. Marquis & Co. (1); Standard Book Co. (1); Teachers Insurance and Annuity Association of America (3); Title Guarantee and Trust Co. (1); Who's Who in California (2); Wisconsin National Life Insurance Co. (1)
Folder 42

P -- Miscellaneous (1925-1929)

Physical Description: 27 items

Edwards A. Park (2); The Peruvian (1); Greenleaf Whittier Pickard (3); Edward F. Pigot, S.J. (4); John Stanley Plaskett (1); Aldo Pontremoli (2); Popular Astronomy (2); Irwin Gillespie Priest (10); J. C. du Pui (2)
Folder 43

R -- Miscellaneous (1925-1929)

Physical Description: 31 items

Radi-Ion Corp. (1); Lord Rayleigh (3); Arthur R. Riddle (2); William F. Rigge, S.J. (4); The Rockefeller Institute for Medical Research (1); R. S. Rockwood (5); Frank Elmore Ross (10); Royal College of Science, Canada (1); Henry Norris Russell (2); Walter Charles Russell (2)
Folder 44

S -- Miscellaneous (1925-1929)

Physical Description: 85 items

W. R. Sawyer (2); Jan Schilt (1); Science and Invention (3); Science Service (1); Scientific American (4); The Scientific Monthly (7); Charles G. Shannon (1); Harlow Shapley (4); Forrest Shreve (4); Clarence Aurelius Skinner (2); Lois T. Slocum (2); D. F. Smiley (3); Eugene H. Smith (4); Louis Bevier Spinney (1); Joel Stebbins (2); Harry Steenbock (2); Harlan True Stetson (22); The Stratford Co. (1); Otto Struve (3); Agnes M. Swain (1); Godfrey Glenton Sykes [many items re Desert Sanatorium] (15)
Folder 45

T -- Miscellaneous (1925-1929)

Physical Description: 13 items

Charles Fitzhugh Talman (3); George Frederick Taylor (7); Frederick F. Tisdall (3)
Folder 46

U -- Miscellaneous (1925-1929)

Physical Description: 6 items

Die Umschau (2); University of California, University News Service (1); University of Chicago, Graduate School of Arts and Literature (2); University of Chicago Alumni Association (1)
Folder 47

V -- Miscellaneous (1925-1929)

Physical Description: 35 items

George Van Biesbroeck (2); The Viscoloid Works [DuPont Viscoloid Co.] (2); Vitaglass Corp. [includes William Wallace, Jr.] (31)
Folder 48

W -- Miscellaneous (1925-1929)

Physical Description: 56 items

J. N. Walters (3); Louise Ware (1); Western Hospital and Nurses Review (13); Wheldon & Wesley, Ltd. (1); Helen Whittaker [Wehe] (10); Who's Who Publishing Co. (1); Inez Wilson (3); George Winchester (2); Wollensak Optical Co. (1); Harry Oscar Wood (1); R. M. Wood (2); The World-Herald [with biographical material on Pettit] (2); Frederick Eugene Wright (9); William Hammond Wright (4); Bernard Langdon Wyatt (3)
Folder 49

Z -- Miscellaneous (1925-1929)

Physical Description: 6 items

J. G. Zaglakides (3); Carl Zeiss, Jena (1); Theodore F. Zucker (1); Robert Victor Zumstein (1)
Box 4

1930-1932

Folder 50

A -- Miscellaneous (1930-1932)

Physical Description: 31 items

Charles Greeley Abbot (4); Robert Grant Aitken (6); Laurence Aller (1); American Astronomical Society (1); American Society for Psychical Research [Glenn Palmer] (4); George Angelovich (2); The Antithesians [re "mind energy" photography] (3); Astronomical Society of the Pacific [Charles Hitchcock Adams, includes 2 typed manuscripts "Temperatures on the Moon"] (8); Edward Ayling (2)
Folder 51

B -- Miscellaneous (1930-1932)

Physical Description: 25 items

Frederick A. Baker (1); E. P. Baltzell (2); R. W. Barfield (3); M. S. Beljavsky (1); Nels A. Bengton (1); George C. Blakslee (1); Nicholas Theodore Bobrovnikoff (3); The Brooklyn Institute of Arts and Sciences (3); Herbert Brownell (8); Robert C. Burt (1); Julio Bustos Navarrete (1)
Folder 52

C -- Miscellaneous (1930-1932)

Physical Description: 18 items

Canadian Pacific (1); Jos J Carlos Mills (5); Edna Carter (1); Frederic Edward Clements (1); Harry Welrose Coffin (2); Corning Glass Works (1); Cosmos Corp. (3); J. W. Crabtree (3); Crucible Steel Company of America (1)
Folder 53

The Desert Sanatorium of Southern Arizona, Inc.(1930-1932)

Physical Description: 40 items

George Earl Davis; Joseph L. McCarthy; Max Pinner; 4 photographs
Folder 54

D -- Miscellaneous (1930-1932)

Physical Description: 9 items

J. B. Dennis (2); C. E. Depperman, S.J. (3); Andrew Ellicott Douglass (2); Lee Alvin DuBridge (2)
Folder 55

F -- Miscellaneous (1930-1932)

Physical Description: 23 items

Hilda Faust (1); Sampaio Ferraz (1); Frederick Eugene Fowle (3); Mason Fraps (1); John J. Frauenfelder (4); J. M. Frawley (2); Edward Elway Free (1); Edwin Brant Frost (10)
Folder 56

G -- Miscellaneous (1930-1932)

Physical Description: 10 items

General Mills, Inc. (1); Arthur Feddeman Gorton (4); B. L. Griffing (2); Alfred D. Guion (3)
Folder 57

H -- Miscellaneous (1930-1932)

Physical Description: 28 items

Oscar A. Hagen (1); E. W. Hawkes (14); Bernard Clifford Hendricks (1); John Severy Hibben (1); Alexander Hollander (1); John M. Howie (1); Philip F. Hoyt [re illness & death of Wilbur F. Hoyt] (3); Wilbur Franklin Hoyt [one letter with note from R. D. Overholt] (6)
Folder 58

I -- Miscellaneous (1930-1932)

Physical Description: 9 items

Industrial Digest (3); International Astronomical Union (3); Joseph C. Ireland (2); James Edmund Ives (1)
Folder 59

K -- Miscellaneous (1930-1932)

Physical Description: 8 items

J. L. Keane (2); Ernst Keil (2); Keystone View Co. of New York (1); Herbert Harvey Kimball (1); Hoyt Klinck (2)
Folder 60

L -- Miscellaneous (1930-1932)

Physical Description: 10 items

Carl Otto Lampland (1); Lancaster High School (1); Lancaster, New Hampshire [to unidentified person re eclipse plans] (1); E. M. Lang, Jr. (2); Leeds & Northrup Co. (3); Arthur Leslie (1); Gertrude Lofy (1)
Folder 61

M -- Miscellaneous (1930-1932)

Physical Description: 24 items

Daniel Trembly MacDougal (3); T. O. McGrath (2); Col. Majors (1); Ross W. Marriott (2); Donald Howard Menzel (10); Meteorological Office, Air Ministry (1); Joseph Haines Moore (4); Laird M. Morris (1)
Folder 62

North American Almanac Company(1930-1932)

Physical Description: 27 items

Most of the correspondence is with J. E. Chrest.
Folder 63

N -- Miscellaneous (1930-1932)

Physical Description: 6 items

Clifford M. Ness (3); Seth Barnes Nicholson (3)
Folder 64

O -- Miscellaneous (1930-1932)

Physical Description: 17 items

Optical Society of America (14); Bernard Levussove Oser [Food Research Laboratories, Inc.] (3)
Folder 65

PETTIT -- PERSONAL (1930-1932)

Physical Description: 31 items

See note in Administrative Information section for permission to use material in the Pettit folders. Baynham-Bunnell Co. (1); Boston Antique Shop (1); California Men of Prominence, Ltd. (3); Richard F. Carlson Motors' Co. (1); Carnegie Institution of Washington (3); The Casualty Association of America (1); Anne M. Goshen (1); Lillian Headley (4); Mrs. Carrie E. [Preston] Herman (2); Rena Gash Leger (3); Pacific Finance Corp. (1); Parsons & Nelson, Inc. (1); Lee Ad. Richmond (2); Teachers Insurance and Annuity Association of America (2); United States Fire Insurance Co. of New York (1); Walter [?] (1); Wisconsin National Life Insurance Co. (3)
Folder 66

P -- Miscellaneous (1930-1932)

Physical Description: 22 items

Fifth Pacific Science Congress (1); Edwin Robert Parker (4); Edmund Parkinson (2); Clarence T. Patterson (6); E. J. Perepelkin (2); Peru State Teachers College (1); Popular Mechanics Magazine (3); D. Price (1); J. C. du Pui (2)
Folder 67

R -- Miscellaneous (1930-1932)

Physical Description: 7 items

Hazel C. Reed (2); R. S. Rockwood (3); Edward A. Rumely (2)
Folder 68

S -- Miscellaneous (1930-1932)

Physical Description: 32 items

The Scientific Monthly (3); George Cheever Shattuck (1); Forrest Shreve (4); Otto Julius Sieplein (1); A. O. Smith Corp. (1); Maynard Goldman Snell (2); D. W. Starrett (5); Gwendolyn Stead (3); Arthur H. Steinhaus (1); Harlan True Stetson (1); H. M. Strecker (2); William Stoermer (2); E. F. Stroh (1); Otto Struve (1); Carl A. Stutsman (3); Ransome Sutton (1)
Folder 69

T -- Miscellaneous (1930-1932)

Physical Description: 6 items

The Texas Co., Road Map Division (1); L. R. Tillotson (2); Clyde William Tombaugh (1); James C. Towle (2)
Folder 70

V -- Miscellaneous (1930-1932)

Physical Description: 2 items

George Van Biesbroeck (2)
Folder 71

W -- Miscellaneous (1930-1932)

Physical Description: 35 items

Ward's Natural Science Establishment, Inc. (5); Washburn College Alumni Association (1); Henry G. Weaver (1); Western Hospital and Nurses Review [later Western Hospital Review] (12); Helen Whitaker [Wehe] (1); Kenneth Williamson (1); M. H. Wodlinger (2); Frederick Eugene Wright (10); William Hammond Wright (2)
Folder 72

Z -- Miscellaneous (1930-1932)

Physical Description: 2 items

Mrs. Katherine Zager (2)
Box 5

1933-1937

Folder 73

A -- Miscellaneous (1933-1937)

Physical Description: 24 items

Charles Greeley Abbot (3); Giorgio Abetti (3); Robert Grant Aitken (5); American Council on Education, Committee on Graduate Instruction (2); American Economic Foundation [Percival White] (1); American Geophysical Union (5); American Philosophical Society (3); H. J. Andrews (1); Apex Films Inc. (1); Astronomical Society of the Pacific [Paul Willard Merrill] (1)
Folder 74

B -- Miscellaneous (1933-1937)

Physical Description: 34 items

Bell & Howell Co. (1); Nels August Bengston (3); H. E. M. Bernhard (1); Walter E. Bernheimer (2); Charles A. Bothamley (2); J. Staley Brode (4); Gertrude Brownell [Randal] (2); Herbert Brownell (2); M. M. [Mrs. Herbert] Brownell (3); S. M. Brownell (2); L. V. Burton (7); Julio Bustos Navarrete (3); Byrd Antarctic Expedition II (2)
Folder 75

C -- Miscellaneous (1933-1937)

Physical Description: 30 items

Arthur Hawthorne Carhart (2); Carnegie Institution of Washington, Division of Publications (5); Carthage College (7); Subrahmanyan Chandrasekhar (1); [?] Clark (1); William Weber Coblentz (2); Joseph P. Cranston (1); Crater Lake National Park (1); Eugene Casson Crittenden (3); Clifford Crump (4); Heber Doust Curtis (1); The Cushman Chuck Co. (2)
Folder 76

D -- Miscellaneous (1933-1937)

Physical Description: 15 items

George Earl Davis (3); Mark W. Delzell [re death of Herbert Brownell] (2); F. Napier Denison (3); The Detroit News (1); Edward R. Dewey (1); Andrew Ellicott Douglass (2); The Drem Products Corp. [see also Photo Utilities, Inc.] (2); Raymond Smith Dugan (1)
Folder 77

E -- Miscellaneous (1933-1937)

Physical Description: 8 items

Eastman Kodak Co. (2); Pio Emanuelli (3); Howard Erwood (2); Roger Shepherd Estey (1)
Folder 78

F -- Miscellaneous (1933-1937)

Physical Description: 8 items

J. W. Fecker (1); Warren F. Fox (3); The Friend (4)
Folder 79

G -- Miscellaneous (1933-1937)

Physical Description: 5 items

Everett Grant (4); Ross Gunn (1)
Folder 80

H -- Miscellaneous (1933-1937)

Physical Description: 50 items

F. H. Hagner [Position Finder Corp.] (7); Charles E. Hall (2); Hanovia Chemical & Manufacturing Co. (1); Hartford, Connecticut, Board of Education (1); Samuel G. Hefelbower [much re Carthage College] (18); Bernard Clifford Hendricks (5); [?] Henson (1); Samuel G. Hibben [Westinghouse Lamp Co.] (2); Edgar Higgins (2); W. J. Hitchcock (4); Holmes Projector Co. (2); John M. Howie (4); The Huntington Library (1)
Folder 81

I -- Miscellaneous (1933-1937)

Physical Description: 17 items

International Astronomical Union [includes G. Abetti, L. d'Azambuja, & W. Brunner] (13); First International Congress of Cosmobiology (1); International Geodesic and Geophysical Union (3)
Folder 82

J -- Miscellaneous (1933-1937)

Physical Description: 3 items

James Manufacturing Co. (2); C. Mackenzie Jones (1)
Folder 83

K -- Miscellaneous (1933-1937)

Physical Description: 4 items

Philip Childs Keenan (4)
Folder 84

L -- Miscellaneous (1933-1937)

Physical Description: 16 items

Frederick Charles Leonard (5); Isabel M. Lewis (2); Library Association of Portland, Oregon (1); W. M. Lindley (3); The Literary Digest [draft of letter to O. C. Nichols on back] (1); Los Angeles Astronomical Society [Mars F. Baumgardt] (1); Hazel Marie Losh (3)
Folder 85

Mount Wilson Observatory (1933-1937)

Physical Description: 11 items

Mainly letters & telegrams to/from staff at Mt. Wilson sent while Pettit was spending the summers at Yerkes Observatory. Walter Sydney Adams; Elizabeth Connor; Edison R. Hoge; Anne McConnel; Elizabeth E. Sternberg; Louise Ware
Folder 86

M -- Miscellaneous (1933-1937)

Physical Description: 90 items

Daniel Trembly McDougal (2); Thomas Orrin McGrath (4); Francis C. McMath (1); Robert Raynolds McMath (45); Alvin Greene McNish (3); Orin E. Madison (2); Aaron Edwin Margulis (8); Emmett Virgil Martin (3); Louise W. Mears (1); Charles Edward Kenneth Mees (9); John Campbell Merriam (4); [British] Meteorological Office (1); H. David Michener [re Robert Dietz] (1); Milwaukee Journal Tour Club (1); Samuel Alfred Mitchell (3); Edwin Moll (1); John R. Mote (1)
Folder 87

N -- Miscellaneous (1933-1937)

Physical Description: 15 items

The National Education Association of the United States [re J. W. Crabtree] (8); Col. Ode C. Nichols (2); Seth Barnes Nicholson (4); Nu-Art Filmco (1)
Folder 88

O -- Miscellaneous (1933-1937)

Physical Description: 8 items

Brian O'Brien (2); Optical Society of America [some re R. R. McMath] (6)
Folder 89

PETTIT -- PERSONAL (1933-1937)

Physical Description: 48 items

See note in Administrative Information section for permission to use material in the Pettit folders. The Athenaeum (1); Birmingham Motor Sales, Inc. (1); John L. Blair [New Process Co.] (2); Carnegie Institution of Washington (6); Cranbrook School (1); Crater Lake National Park (1); Crawford-Dawe-Grove Agency (2); T. M. Evans (1); Farmers Automobile Inter-Insurance Exchange (1); The Fuller Brush Co. (1); Lillian Headley (1); Internal Revenue Service (2); Rena W. Leger (3); Alma Pettit (3); John W. Pettit (2); Leonard Pettit (3); The Robert Phillipps Co. (6); Mabel Raymond (1); San Francisco pamphlet (1); Florence L. Sawyer (2); Title Guarantee and Trust Co. (1); Union Pacific Railroad Co. (2); United States Fire Insurance Co. [Sadler & Holmes Insurance] (1); Katherine Louise Van Wyck [draft of letter to Walter Whitney on back] (1); W. V. Wiegand (1); Wisconsin National Life Insurance Co. (1)
Folder 90

P -- Miscellaneous (1933-1937)

Physical Description: 17 items

Pacific Library Binding Co.(2); Pacific Metals Co., Ltd. (1); City of Pasadena (2); Robert Methven Petrie (3); Philippine Islands Weather Bureau (1); Photo Utilities, Inc. (1); Mary Pickford (1); Pickford-Lasky Productions, Inc. (1); H. H. Porter, Jr. (2); Thomas Charles Poulter (2); D. Price (1)
Folder 91

R -- Miscellaneous (1933-1937)

Physical Description: 11 items

R & M Electric Sign, Co. (1); Radio Press Service (1); Paul Rudnick (2); C. F. Rust (7)
Folder 92

Sunny Schick (1933-1937)

Physical Description: 20 items

Sunny Schick was a brokerage house for photographic & cinematic equipment, film, lamps, etc.
Folder 93

S -- Miscellaneous (1933-1937)

Physical Description: 85 items

Linn W. Scherer (2); Scientific American [Albert G. Ingalls] (2); Frederick Hanley Seares (4); Ralph M. Shaw, Jr. (2); Erle V. Simon (3); W. T. Skilling (6); Frederick Slocum (8); Dorothy Smith (2); The Society for Research on Meteorites (1); Theodore Eugene Sterne (1); Harlan True Stetson (4); F. J. M. Stratton (5); Henry Frederick Strohecker (2); John Donovan Strong (1); Otto Struve (38); Goodwin Deloss Swezey (4)
Folder 94

T -- Miscellaneous (1933-1937)

Physical Description: 9 items

W. Taverner (3); Theodore F. Tarbox (2); Samuel E. Traudt (2); Gertrude Ogden Tubby (2)
Folder 95

U -- Miscellaneous (1933-1937)

Physical Description: 1 item

U.S. Printing Office, Superintendent of Documents (1)
Folder 96

V -- Miscellaneous (1933-1937)

Physical Description: 4 items

Vard Mechanical Laboratory (1); Carl E. Veach (1); Victor Animatograph Co. (1); M. Volochine (1)
Folder 97

W -- Miscellaneous (1933-1937)

Physical Description: 57 items

K. P. Walton [Back-Yard Astronomer's Society] (3); The Warner & Swasey Co. (2); Ph. WehrlJ (1); S. T. Welchover (2); Whitehead & Kales Co. (3); Walter Ticknor Whitney (4); D. P. Wilson (2); Leonard William Wing (3); Wollensak Optical Co. (1); The World Calendar Association, Inc. (2); Frederick Eugene Wright (34)
Box 6

1938-1946

Folder 98

A -- Miscellaneous (1938-1946)

Physical Description: 53 items

Giorgio Abetti (5); Adler Planetarium (3); Aircraft Radio Laboratory, War Department (2); Allegheny Ludlum Steel Corp. (5); American Association of Scientific Workers (2); American Astronomical Society [Joel Stebbins] (1); "American Defense" [California Institute, Huntington Library, Mount Wilson Observatory Group] (1); American Geophysical Union [Charles Franklin Brooks, letter re C. G. Abbot's proposal --includes carbons of letters from: Helmut Landsberg, Larry F. Page, Harlan True Stetson, Homer Woodworth Clough, & Chaim Leib Pekeris] (10); American Peoples Encyclopedia (11); Clifford Norman Anderson [includes typed manuscript "A Representation of the Sunspot Cycle", copy letter from John Adam Fleming, & copy typed ms. "Solar Radiation and Geomagnetism," by J. Bartels] (6); L. E. Armfield (2); Betty June Arnold (2); Astronomical Society of the Pacific (2); L. d'Azambuja (1)
Folder 99

B -- Miscellaneous (1938-1946)

Physical Description: 54 items

Louis C. Barail (1); Barber-Colman Co. (1); Pierre Basmaison (6); Mars Baumgardt (1); Bausch & Lomb Optical Co. (8); Nels August Bengtson (1); Biographical Encyclopedia of the World (1); Anna Jean Blackstad [Pomona College] (1); The Blakiston Co. (2); Harold Francis Blum (2); John S. Bordner (1); Braun Corp. (1); J. Stanley Brode (1); Frederick Augustus Brooks (18); Charles E. R. Bruce (5); Harris L. Burnett (2); Vannevar Bush (2)
Folder 100

C -- Miscellaneous (1938-1946)

Physical Description: 32 items

Calexico Engineering Works (1); California Institute of Technology [re Edna Carter] (2); John William Campbell [includes letter from Ernest Sydney Keeping to E.P.] (3); Leon Campbell (8); Robert M. Campbell [a.k.a. Roupert Rivierre] (5); Carnegie Institution of Washington [includes letters re Exhibit Committee & from V. Bush] (7); Tommy Cave (2); Alvan Clark & Sons Co. (1); Columbia Broadcasting System (1); Consolidated Book Publishers (1); Heber Doust Curtis [copy letter to G. V. Krishnaswami] (1)
Folder 101

D -- Miscellaneous (1938-1946)

Physical Description: 11 items

Dover Publications (2); Dow Radio Supply Co. (1); Theodore Dreiser (3); Ducommun Metals and Supply Co. (3); Theodore Dunham, Jr. (2)
Folder 102

E -- Miscellaneous (1938-1946)

Physical Description: 28 items

Eastbay Astronomical Association (6); Eastman Kodak Co. (5); Levantia V. Eaton (2); Egyptian Lacquer Manufacturing Co. (1); L. C. Eichner (2); John W. Evans (7); Mrs. Marion H. Evans (1); The Ex-Marine Guards, Inc. [re Lotan S. King] (2)
Folder 103

F -- Miscellaneous (1938-1946)

Physical Description: 7 items

Federation of Natural Sciences of Southern California (1); R. Y. Ferner Co. (1); Fish-Schurman Corp. (2); Clyde Fisher [Hayden Planetarium] (1); John Adam Fleming (2)
Folder 104

G -- Miscellaneous (1938-1946)

Physical Description: 9 items

The Gaertner Scientific Corp. (1); Fred M. Garland (2); Girard-Perregaux (1); Glendale Public Library (2); Richard Halsey Goddard (1); Arthur W. Graham, Jr. (2)
Folder 105

H -- Miscellaneous (1938-1946)

Physical Description: 68 items

Carl Halvarson (2); Julie M. Vinter Hansen [includes correspondence with Astronomical Society of the Pacific] (7); Arthur Cobb Hardy (1); Ezra Clarence Harrah (7); Robert Torrens Hatt (2); Ruth E. Hayner (4); Rosemary Heckelman (2); Samuel G. Hefelbower (7); Neal J. Heines (10); Bernard Clifford Hendricks (1); Carl Hinshaw [includes form letter from "American Defense"] (3); Bert Hollenbee (1); Holmes Projector Co. (1); H. J. Holmquest (2); Houghton-Mifflin Co. (1); John M. Howie (3); Edward Olson Hulburt (3); H. R. Hulme (3); Ellsworth Huntington (2); Charles W. Hurd (6)
Folder 106

I -- Miscellaneous (1938-1946)

Physical Description: 1 item

Herschel C. Ice (1)
Folder 107

J -- Miscellaneous (1938-1946)

Physical Description: 12 items

Theodore Siegumfeldt Jacobsen (2); Jean Jacques (2); Harry Raymond James (1); Frank Covert Jean (6); Clinton K. Judy (1)
Folder 108

K -- Miscellaneous (1938-1946)

Physical Description: 5 items

Gerard Peter Kuiper (5)
Folder 109

L -- Miscellaneous (1938-1946)

Physical Description: 58 items

William Charles Lamb (3); Helmut Landsberg (3); Harold H. Lane (1); Leach Relay Co. (1); Oliver Justin Lee (2); Frederick Charles Leonard (2); Israel Monroe Levitt (3); Life Magazine (3); Earle Garfield Linsley (19); Rudolph Martin Lippert (15); Rollin M. Lobaugh (1); Crosby Lockwood & Son Ltd. (3); Los Angeles Astronomical Society (1); Los Angeles Examiner (1)
Folder 110

M -- Miscellaneous (1938-1946)

Physical Description: 58 items

G. Kent McCauley (2); Duncan E. Macdonald (2); Mrs. Elizabeth McGaffey (2); McGraw-Hill Book Co., Inc. (2); Andrew McKellar (1); Robert Raynolds McMath (19); The MacMillan Co. (3); Mrs. Allison Marti (1); L. A. Matheson (1); John Campbell Merriam (2); Meteorological Ofice, South Kensington, London (1); Meteorological Office, Stonehouse, Gloucestershire (1); William Ferdinand Meyer (1); John T. Middleton (2); George Wilber Moffitt [re Optical Society of America] (8); Mrs. A. T. Monk (2); Paul Mooney (1); William D. Morgan (7)
Folder 111

N -- Miscellaneous (1938-1946)

Physical Description: 13 items

A. L. Narayan (2); National Geographic Magazine (2); Nelson's Encyclopedia (6); Archie M. Newton (1); Seth Barnes Nicholson (2)
Folder 112

O -- Miscellaneous (1938-1946)

Physical Description: 6 items

Office of Scientific Resarch and Development [Mina Rees] (1); Optical Society of America (1); Maury Osborne (2); S. L. Osborne (2)
Folder 113

PETTIT -- PERSONAL (1938-1946)

Physical Description: 34 items

See note in Administrative Information section for permission to use material in the Pettit folders. Carnegie Institution of Washington (11); Cranbrook School (2); Lena Freiday-Scott (2); H. Hallenbeck (2); Munger & Munger (1); Nemaha County, Nebraska, Clerk's Office (1); Charles A. O'Connor (1); City of Pasadena (1); Helen Pettit (3); Leonard Pettit (2); Sadler and Holmes (2); Science Service (2); Teachers Insurance and Annuity Association of America (1); Veterans Administration (2); Walter [?] [cousin] (1)
Folder 114

P -- Miscellaneous (1938-1946)

Physical Description: 22 items

Pacific Library Binding Co. (2); Pantechnical Manufacturing Co. (1); Pasadena Defense Council (1); Pasadena Jumior College (1); John Benjamin Penniston [Printed Matter] (1); Robert Methven Petrie (4); William F. Petersen (2); Karl D. Pettit (2); The Pointer (3); Polaroid Corp. (3); Henry Leroy Pugh (2)
Folder 115

R -- Miscellaneous (1938-1946)

Physical Description: 13 items

R[adio] C[orporation of] A[merica] Communications, Inc. (2); Emery L. Radwany (2); Lee Ad. Richmond (2); Walter Orr Roberts (3); Henry Norris Russell (4)
Folder 116

S -- Miscellaneous (1938-1946)

Physical Description: 97 items

Mrs. Beth Satterthwaite (2); Harold E. Sawyer (3); J. G. Schott (1); Science (3); Science Service (1); The Scientific Monthly (3); F. J. Sellers (4); Charles Donald Shane (1); John T. Shannon (3); Albert V. Shatzel (8); Victor Ernest Shelford (3); James M. Sheridan (2); Jessie May Short (1); W. T. Skilling (16); The Sky (1); Sky and Telescope (2); Earl Carl Slipher (1); Harry F. Smejkal (1); Dana Smith (3); Walter Soller (3); The Sponge Rubber Products Co. (1); Joel Stebbins (2); Theodore Eugene Sterne (8); Harlan True Stetson (3); F. J. M. Stratton (2); Otto Struve (12); Sunny Schick (4); Polydore Swings (3)
Folder 117

T -- Miscellaneous (1938-1946)

Physical Description: 7 items

A. David Thackeray (2); John Troxell (1); Franklin Marion Turrell (4)
Folder 118

U -- Miscellaneous (1938-1946)

Physical Description: 22 items

U.S. Army Corps of Engineers [re Pettit's involvement with Atomic Bomb Project] (16); U.S. Naval Observatory (2); University of Santa Clara [re Mount Lowe telescope] (2); Albrecht Unsold (2)
Folder 119

V -- Miscellaneous (1938-1946)

Physical Description: 2 items

George Van Biesbroeck (2)
Folder 120

W -- Miscellaneous (1938-1946)

Physical Description: 48 items

Margaret Walker (3); Waltham Watch Co. (2); K. P. Walton (3); Louise Ware (1); Arthur Howard Warner [re E= meeting] (3); Earle Horace Warner (5); Warner Bros. Pictures, Inc. (1); David Warshaw [includes correspondence with John Adam Fleming] (5); Harold Weaver (1); B. Westermann Co., Inc. (1); Western Electric Co. [re Lewis B. Browder] (2); The Western Union Telegraph Co. (2); Walter Ticknor Whitney (2); John Wiley & Sons, Inc. (2); Robley Cook Williams (1); Virginia Lucille Williams (2); George Winchester (2); Leonard William Wing (2); Wisconsin Department of Agriculture (1); Rev. W. Rees Wright (4); Oliver Reynolds Wulf (2); James V. Wyber (1)
Folder 121

Y -- Miscellaneous (1938-1946)

Physical Description: 1 item

Anne S. Young (1)
Folder 122

Z -- Miscellaneous (1938-1946)

Physical Description: 2 items

Walter W. Zimmerman (2)
Box 6 (Folders 123-130)

Manuscripts and graphs

 

Manuscripts and graphs by Edison Pettit

Folder 123

The Application of Vacuum Thermocouples to Astronomical Problems

Copy, typed ms., 3 pp. [with Seth Barnes Nicholson]
Folder 124

Distance Along Tape from Trunion of Thezac Porsmers Lens to Circle of Given Intensity

Pencil graph, 1 p.
Folder 125

Focal Changes Produced by Temperature Changes in Coelostat Mirrors

Copy, typed ms., 2 pp. [for Annual Report, 1922]
Folder 126

Limiting Accuracy of the Micrometer Caliper

Copy, typed ms. with corrections, 2 pp.
Folder 127

Measurement of Ultra-Violet Solar Radiation at Mount Wilson

Copy, typed ms., 2 pp.
Folder 128

The Possible Escape of Prominences from the Sun

2 copies, typed ms., 3 pp. each
Folder 129

Stellar Radiation

Pencil ms., 2 pp. [with Seth Barnes Nicholson]
 

Manuscript by Harold Delos Babcock

Folder 130

A Measurement of the Solar Limb Effect (Abstract)

Copy, typed ms., 1 p.