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Frederick Hanley Seares Papers: Finding Aid

Processed by Ronald S. Brashear, completed February 24, 1998; machine-readable finding aid created by Xiuzhi Zhou in 1998; supplementary encoding and revision by Diann Benti in June 2017. The Huntington Library, Art Collections, and Botanical Gardens Manuscripts Department 1151 Oxford Road San Marino, California 91108 Phone: (626) 405-2129 Email: [email protected] URL: http://www.huntington.org © 1998 The Huntington Library. All rights reserved.

Frederick Hanley Seares Papers: mssSeares papers 1 Finding Aid Overview of the Collection Title: Frederick Hanley Seares Papers Dates (inclusive): 1909-1945 Bulk dates: 1909-1940 Collection Number: mssSeares papers Creator: Seares, Frederick Hanley, 1873-1964. Extent: Approximately 10,000 items in 21 boxes Repository: The Huntington Library, Art Collections, and Botanical Gardens. Manuscripts Department 1151 Oxford Road San Marino, California 91108 Phone: (626) 405-2129 Email: [email protected] URL: http://www.huntington.org Abstract: This collection contains the papers of Frederick Hanley Seares (1873-1964), a staff astronomer at the Mount Wilson Observatory known for his photometric studies and his editorial work. Language: English. Access Open to qualified researchers by prior application through the Reader Services Department. For more information, contact Reader Services. 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. Preferred Citation [Identification of item]. Frederick Hanley Seares Papers, The Huntington Library, San Marino, California. Provenance Deposit, Observatories of the Carnegie Institution of Washington Collection, 1988. Approximately fifty additional separate collections form the Mount Wilson Papers of the Observatories of the Carnegie Institution of Washington and are available for research in the Huntington Library. Processing/Project Information Cataloging of the papers was completed in 1989 prior to their transfer to the Huntington. Biographical Note Frederick Hanley Seares (1873-1964), staff astronomer at the Mt. Wilson Observatory, was involved in most of the administrative and research activities of the Observatory. Highly regarded for his photometric studies and his editorial work, Seares was a prominent figure in astronomy during the first half of the twentieth century. The papers in this collection begin in 1909, when he arrived at Mt. Wilson, and end in 1945, when he ended his affiliation with the Observatory. Seares was born on May 17, 1873, on a farm near Cassopolis, in the southwest corner of Michigan. In 1878, his parents, Isaac Newton Seares and the former Ella Ardelia Swartwout, moved the family to Iowa. They moved again in 1887 to Pasadena, California, where Isaac Seares became involved in the real estate and insurance business. Frederick Seares enrolled at the new Pasadena High School where he was one of its first six graduates in 1890. Seares then matriculated at the University of California in Berkeley and studied under Armin Otto Leuschner. Graduating in 1895 with a B. S. degree (with honors), Seares remained at Berkeley as a Fellow and then Instructor. While at Berkeley, Seares met and on May 28, 1896, married Mabel Urmy, a teacher at Miss Head's School for Girls. In 1899, Seares went to Europe to continue his studies, a practice common among young American scientists of this time. He was accompanied by his wife and they spent one year at the University of Berlin and a second year at the Sorbonne in Paris. Seares's only child, Richard Urmy Seares, was born while the couple resided in Paris. They returned to the United States in 1901, and Seares quickly obtained a position as Professor of Astronomy at the University of Missouri and Director of the Laws Observatory in Columbia. For the next eight years, Seares updated the equipment at the Laws Observatory and engaged in a rich program of astronomical research.

Frederick Hanley Seares Papers: mssSeares papers 2 Finding Aid The major turning point in Seares's career came in 1909 when George Ellery Hale invited him to join the staff of the Mt. Wilson Observatory. The new 60-inch reflecting telescope had just come into use on Mt. Wilson, greatly expanding the scope of the Observatory's research. With Walter Sydney Adams being promoted to the head of the new Department of Stellar Spectroscopy, Seares replaced Adams as head of the Computing Division. In addition, Seares was given editorial charge of the Observatory's publications as well as telescope time on the 60-inch to pursue research in stellar photometry. Mt. Wilson's Computing Department consisted almost entirely of women. Most of them were college-educated with training in mathematics and some experience at their college observatories. Their work consisted of tedious measuring of the wavelengths of spectral lines, stellar positions, or stellar brightness (magnitudes). Located exclusively at the Observatory's office building in Pasadena, the computers' work was so involved that they were often given joint authorship in the astronomers' published papers. Occasionally, a promising young male with a Ph.D. in astronomy would be hired as a computer so that he could be available when a staff position would be created. The men might also be a computer in order to have a summer job between school years. As head of the Department, Seares corresponded greatly with potential computers and this material is in eleven folders separated from his general letters. Included in this section are letters of recommendation from various individuals. From 1904 to 1948, Mt. Wilson Observatory issued its astronomers' published papers as Contributions from the Mount Wilson [Solar] Observatory.Even though these papers were published elsewhere (mostly in the Astrophysical Journal or Publications of the Astronomical Society of the Pacific),Hale felt the necessity of having a separate identity for his observatory's publications. As a consequence, he wanted to have one person take care of editing his staff's papers in order to provide some type of consistency. This became Seares's job, and he was highly praised by his colleagues in his ability to turn their work into polished scientific papers, in some cases practically re-writing them to do so. Seares would then submit the papers to the various journals and then correct the proofs. In addition, in 1927 he became a Collaborating Editor and in 1934, Associate Editor, of the Astrophysical Journal.In his papers, therefore, there is a great deal of correspondence with the other editors of this journal, Edwin Brant Frost, Henry Gordon Gale and Otto Struve. There is also a large amount of correspondence with the staff of the Carnegie Institution of Washington's Division of Publications and Edwin Bidwell Wilson, the editor of the publications of the National Academy of Sciences. Along similar lines, Seares was given the task of building up the Observatory's library. Much of his Miscellaneous correspondence consists of his efforts in obtaining material for the library as well as requests from others for copies of the Observatory's publications. In recognition of his administrative abilities, Adams, Mt. Wilson's second Director, appointed Seares Assistant Director in 1925. Until his retirement in 1940, Seares would be in charge of the observatory whenever Adams was away (which was not that often) and some of his correspondence reflects this position. While about one-half of Seares's papers deals with administrative matters, the remainder covers his scientific work. At the Laws Observatory, Seares had gained experience in the field of photometry (measuring the brightness of stars and other celestial bodies). Upon his arrival, he became involved in the photometric research planned for the new 60-inch telescope. The central figure in Mt. Wilson's photometric plans was the Dutch astronomer Jacobus Cornelius Kapteyn. Kapteyn was the leading authority in the field of statistical astronomy. In statistical astronomy, the astronomer worked with a selected statistical sample of stars. Since the stars were too numerous to deal with one at a time, an astronomer would concentrate on a manageable number of stars and extrapolate results for all the stars based on his or her sample. In this way, a research program could be completed within an astronomer's lifetime. In 1906, Kapteyn proposed a scheme of selecting 252 "Selected Areas" spread out over regular intervals across the sky. With international cooperation, the stars in these areas could be studied in detail in order to gain knowledge about the entire Milky Way. When the 60-inch telescope entered service in 1909, it was the most powerful telescope in the world at the time. Kapteyn persuaded Hale to devote some of its time to taking photographs of the 139 Selected Areas within its reach. These photographic plates would then be sent to Kapteyn at Groningen where they could be analyzed. Since the 60-inch telescope would reveal stars fainter than any previously measured, Seares studied the telescope's photographic characteristics in order to develop a proper measurement of stellar magnitudes. After comparisons with other standards of stellar brightness measurements, Seares realized that the prevailing methods of measuring stellar magnitudes were not able to provide him with the accuracy and consistency that he demanded. Starting from scratch, Seares undertook the Herculean task of defining the proper methods and standards of in-focus photographic photometry. He was soon able to establish a common ground for his results and the Harvard North Polar Sequence (a list of magnitudes for stars near the North Celestial Pole. These stars were used since they were always visible to any Northern Hemisphere observatory). Seares began measuring the magnitudes of the stars in the Selected Areas with the assistance of other astronomers at Mt. Wilson and Groningen. By meticulously comparing the stars in one Area to those in nearby Areas and in the North Polar Sequence, they accurately measured the positions and magnitudes of 67,941 stars. The entire process took nine years and the results were published in 1930 as the Mount Wilson Catalogue of Photographic Magnitudes in Selected Areas 1-139, by Seares, Kapteyn, and Pieter Johannes van Rhijn (the latter taking over for Kapteyn who died in 1922), assisted by Mary Cross Joyner and Myrtle L. Richmond. The Catalogue set

Frederick Hanley Seares Papers: mssSeares papers 3 Finding Aid new standards for accuracy and faintness. The technical accomplishments involved were acknowledged as extraordinary. The only one not totally satisfied was Seares himself. As a final effort, he developed a new, more accurate, set of magnitudes for stars in the North Polar Region. With the aid of Joyner and the astronomer Frank Elmore Ross, their work culminated in 1941 with the publication of Magnitudes and Colors of Stars North of +80°.This work replaced the previous standards which had been adopted internationally in 1932. To document these photometric studies, Seares's papers contains a good deal of correspondence with Kapteyn, van Rhijn, Ross, and Edward Charles Pickering. The manuscripts for the two aforementioned publications are also included in the collection. Seares's early photometric research gained him enormous respect from his colleagues. This resulted in his being elected President of the Commission on Stellar Photometry (Commission #25) of the new International Astronomical Union (IAU) in 1922. Formed in 1919 out of the International Union for Co-operation in Solar Research, the IAU provided a forum for astronomers of all nations and in various specialties to coordinate their research. Seares served as President of his Commission for sixteen years. In that capacity, he was able to organize a comparison of magnitudes of North Polar stars in seven different catalogues (including Harvard, Yerkes, Greenwich, and Potsdam's measurements) which led to the IAU adopting a homogeneous system as an international standard in 1932. It was this standard which was later surpassed by Seares, Ross, and Joyner's 1941 work (see above). Seares's IAU correspondence is contained in ten folders in the collection. Related material can also be found in the correspondence with Bertil Lindblad, Cecilia Helena Payne (-Gaposchkin), and Harlow Shapley. Although photometry accounted for most of Seares's scientific work he was also involved in other fields of investigation. These include: (1) studying the structure of the Milky Way based on star counts; (2) the importance of star colors; (3) attempts to measure the magnetic field of the sun; (4) determination of the masses of binary stars. The amount of material on these subjects in the collection is sparse when compared to that on photometry, however. 1940 proved to be a significant year in Seares's life. In that year he retired from the staff at Mt. Wilson. To enable him to continue to do research at the Observatory, however, he was appointed a Research Associate for the next five years. Very few items in Seares's papers are from this period, most being from his active period from 1909 to 1940. In 1940 he also became Director of the Astronomical Society of the Pacific (until 1946) and was awarded the Society's Bruce Gold Medal. In giving Seares the award, the Society cited him in the following way: Dr. Seares's most important contributions to the science of astronomy pertain to the nature, brightness, and distribution of the stars. His investigations in these and allied subjects are fundamental, and in this field he is recognized as an outstanding authority.... His painstaking work in determining fundamental standards over the whole range of observable photographic magnitudes is recognized by photometric observers the world over as an achievement of the highest importance to astronomy. It was also in 1940 that Seares's wife passed away. Two years later, Seares married his long-time colleague at Mt. Wilson, Mary Joyner. Seares ended his affiliation with Mt. Wilson and the Astrophysical Journal in 1945. He and his wife soon moved to Santa Barbara, California, then later to Honolulu, Hawaii, where Seares died on July 20, 1964. It is ironic that most of Seares's photometric work was soon surpassed by new technical developments. The introduction of photoelectric devices into photometry after World War II made most photographic photometry techniques obsolete. This is perhaps the major reason why Seares is not thought of today as an important figure in astronomy's history. It would be wrong, however, to underestimate his contributions to the astronomy of his period merely because his techniques are not generally practiced today. Scope and Content The collection consists of the correspondence files and manuscripts, notes, and notebooks of American astronomer Frederick Hanley Seares. While roughly one half of the papers deal with administrative matters of the Mount Wilson Observatory, the remainder cover his scientific work. There are also some manuscripts, notes and notebooks (Boxes 19-21) related to Seares's research activities. Correspondents represented in the collection include: Walter S. Adams, Robert Grant Aitken, Edward Emerson Barnard, William Wallace Campbell, Gustav Fock, Edwin Brant Frost, Henry Gordon Gale, Cecilia Helena Payne Gaposchkin, Walter M. Gilbert, George Ellery Hale, Ejnar Hertzprung, Edwin Powell Hubble, J.C. Kapteyn, Armin Otto Leuschner, C.E. Kenneth Mees, John C. Merriam, Charlotte Emma Moore, John Adelbert Parkhurst, Francis Gladheim Pease, Edward C. Pickering, P.J. van Rhijn, Frank E. Ross, Henry Norris Russell, Harlow Shapley, Joel Stebbins, Otto Struve, and Edwin Bidwell Wilson. Corporate and organizational organizations represented in the collection include: American Association for the Advancement of Science, Astronomical Society of the Pacific, Carnegie Institution of Washington, William H. Guild & Company, International Astronomical Union, International Union for Co-operation in Solar Research, Mount Wilson Observatory and the University of Chicago Press. Arrangement

Frederick Hanley Seares Papers: mssSeares papers 4 Finding Aid This collection is arranged in the following series: 1. Correspondence, 1909-1945. (Boxes 1-18) This series contains both incoming and carbons of outgoing correspondence. They are arranged in alphabetical order by correspondent. 2. Manuscripts, notes, and notebooks. (Boxes 19-21) The manuscripts are arranged in alphabetical order by the first keyword in the title. Seares'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. Indexing Terms The following terms have been used to index the description of this collection in the Huntington Library's Online Catalog. Subjects Seares, Frederick Hanley, 1873-1964 -- Archives. Carnegie Institution of Washington. Mount Wilson Observatory -- History -- Sources. Astronomers -- California, Southern -- Archives. Astronomers -- Correspondence. Astronomical photometry. Astronomy -- Research. Forms/Genres Letters (correspondence) -- 20th century. Manuscripts -- 20th century. Notebooks -- 20th century. Notes -- 20th century. Alternate Authors Adams, Walter S. (Walter Sydney), 1876-1956. Aitken, Robert Grant, 1864-1951. Barnard, Edward Emerson, 1857-1923. Campbell, William Wallace, 1862-1938. Fock, Gustav, 1893-1974. Frost, Edwin Brant, 1866-1935. Gale, Henry Gordon, 1874-1942. Payne-Gaposchkin, Cecilia, 1900-1979. Gilbert, Walter M. Hale, George Ellery, 1868-1938. Hertzsprung, Ejnar, 1873-1967. Hubble, Edwin, 1889-1953. Kapteyn, J. C. (Jacobus Cornelius), 1851-1922. Leuschner, Armin Otto, 1868-1953. Mees, C. E. Kenneth (Charles Edward Kenneth), 1882-1960. Merriam, John C. (John Campbell), 1869-1945. Moore, Charlotte Emma, 1898-1990. Parkhurst, John Adelbert, 1861-1925. Pease, F. G. (Francis Gladheim), 1881- Pickering, Edward C. (Edward Charles), 1846-1919. Rhijn, P. J. van (Pieter Johannes), 1886- Ross, Frank E. (Frank Elmore), 1874-1960. Russell, Henry Norris, 1877-1957. Shapley, Harlow, 1885-1972.

Frederick Hanley Seares Papers: mssSeares papers 5 Finding Aid Stebbins, Joel, 1878-1966. Struve, Otto, 1897-1963. Wilson, Edwin Bidwell, 1879-1964. American Association for the Advancement of Science. Astronomical Society of the Pacific. Carnegie Institution of Washington. William H. Guild & Company. International Astronomical Union. International Union for Co-operation in Solar Research. University of Chicago. Press.

Note

The following descriptions list the folder number, folder title, years of material in the folder (when relevant), and the number of items in the folder (in brackets). If a further description of the folder contents is necessary, this will follow on the next line. If the word "folded" appears in the description, this indicates the presence of oversize materials in a folded condition.

c.ltr: copy of a letter

EPH: Edwin Powell Hubble

FHS: Frederick H. Seares

GEH:George Ellery Hale

incl.: includes

ltr.: letter

tlgrm: telegram

WSA: Walter Sydney Adams

Correspondence

Box 1 Correspondence: A - Bid

Folder 1 Charles Greeley ABBOT 1915, 1921, 1924, 1929-30, 1935 Physical Description: [23] Scope and Content Note {includes ltr FHS ? Miss Frances L. St. John}

Folder 2 Giorgio ABETTI 1911, 1929-30, 1938 Physical Description: [11] Scope and Content Note {incl ltr GA ? WSA}

Folder 3 Sir William de Wiveleslie ABNEY 1912-13 Physical Description: [6]

Frederick Hanley Seares Papers: mssSeares papers 6 Finding Aid Correspondence Correspondence: A - Bid

Folder 4 ABSTRACTS 1921-22 Physical Description: [5] Scope and Content Note {material dealing with preparation of abstracts for the Astrophysical Journal}

Folder 5 Leason Heberling ADAMS 1934-36 Physical Description: [7]

Folder 6 Walter Sydney ADAMS 1926-27, 1932-33, 1935-36, 1938 Physical Description: [23]

Folder 7 Robert Grant AITKEN 1910-13, 1916 Physical Description: [40] Scope and Content Note {incl ltr Julius T. Stone -> D. S. Richardson}

Folder 8 Robert Grant AITKEN 1917-23 Physical Description: [33]

Folder 9 Robert Grant AITKEN 1928-32, 1935, 1937-39 Physical Description: [39]

Folder 10 AMERICAN ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE 1936-38, 1940 Physical Description: [42] Scope and Content Note {Correspondents are: Henry B. Ward; Earle H. Clapp; Harlan T. Stetson; F. R. Moulton; Austin H. Clark; Paul W. Merrill; Ian Campbell}

Folder 11 AMERICAN EXPRESS CO. 1912 Physical Description: [6]

Folder 12 Joseph Sweetman AMES 1912, 1915-16 Physical Description: [7]

Folder 13 Clement Walker ANDREWS 1910, 1913-14, 1916, 1919 Physical Description: [14] Scope and Content Note {incl ltrs of Charles J. Barr; Félix de Roy}

Folder 14 ASTRONOMICAL SOCIETY OF THE PACIFIC 1913, 1916-18 Scope and Content Note {D. S. Richardson}

Folder 15 ASTRONOMICAL SOCIETY OF THE PACIFIC Jan-June 1929 Physical Description: [22] Scope and Content Note {Charles Hitchcok Adams; Robert Grant Aitken; Ernest W. Brown; Arthur G. Vestal; Armin Otto Leuschner; Frank Schlesinger}

Frederick Hanley Seares Papers: mssSeares papers 7 Finding Aid Correspondence Correspondence: A - Bid

Folder 16 ASTRONOMICAL SOCIETY OF THE PACIFIC July-Dec 1929 Physical Description: [32] Scope and Content Note {R.G.Aitken; A.G.Vestal; C.H.Adams; Ernest C. Watson; Frank Mergenthaler; Frederick C. Leonard}

Folder 17 ASTRONOMICAL SOCIETY OF THE PACIFI C 1930, 1932 Physical Description: [14] Scope and Content Note {C.H.Adams; Max Wolf}

Folder 18 A -- MISCELLANEOUS Physical Description: [35] Scope and Content Note {C. E. Adams; Hans Christian Adamson; Agence de Libraire et de Publications; Dinsmore Alter; American Academy of Arts and Sciences; American Astronomical Society [Raymond Smith Dugan]; American Council on Education; American Mathematical Society [Marc H. Ingraham]; American Offset Printers; American Telescope Laboratories, Inc.; Genevieve Arduin; Merle Armitage; Associated Press; Association of Colleges and Universities of the Pacific Southwest [Charles T. Fitts; Ernest J. Jaqua]; J. Attarablas; Audiphone Co.; Automobile Club of Southern California. folded}

Folder 19 Walter BAADE 1930, 1932, 1938, 1942 Physical Description: [5]

Folder 20 Horace Welcome BABCOCK 1938 Physical Description: [2]

Folder 21 Jules BAILLAUD 1937-38 Physical Description: [4]

Folder 22 Robert Horace BAKER 1912-14, 1919 Physical Description: [16]

Folder 23 Wilder Dwight BANCROFT 1911, 1913 Physical Description: [5]

Folder 24 Edward Emerson BARNARD 1910, 1912-14, 1917-18, 1920, 1922 Physical Description: [43]

Folder 25 William BARNUM 1920 Physical Description: [3]

Folder 26 Storrs Barrows BARRETT 1910 Physical Description: [3]

Folder 27 Johann Ambrosius BARTH 1911 Physical Description: [2]

Folder 28 Louis Agricola BAUER 1916, 1919 Physical Description: [13]

Frederick Hanley Seares Papers: mssSeares papers 8 Finding Aid Correspondence Correspondence: A - Bid

Folder 29 BAUSCH & LOMB OPTICAL CO. 1909 Physical Description: [9]

Folder 30 James G. BIDDLE 1910 Physical Description: [3]

Box 2 Correspondence: Bil - Carnegie Institution of Washington Division of Publications (1934)

Folder 31 J. van der BILT 1913-16, 1918-19, 1926 Physical Description: [21] Scope and Content Note {incl 1 photo}

Folder 32 BINNER-WELLS CO. 1909-11 Physical Description: [14]

Folder 33 Nicholas Theodore BOBROVNIKOFF 1928-29, 1938 Physical Description: [7]

Folder 34 Bart Jan BOK 1932-34, 1937, 1940 Physical Description: [13]

Folder 35 Benjamin BOSS 1915, 1917, 1919 Physical Description: [7]

Folder 36 Lewis BOSS 1910-11 Physical Description: [3]

Folder 37 Eda C. BOWMAN 1912 Physical Description: [2]

Folder 38 Frank Parkhurst BRACKETT 1914, 1917-18 Physical Description: [8]

Folder 39 JOHN A. BRASHEAR CO., LTD. 1911 Physical Description: [4]

Folder 40 BROCK & FEAGANS JEWELERS 1909, 1925-26 Physical Description: [13] Scope and Content Note {25-26 under name Brock & Co. Jewelers}

Folder 41 BRYAN-BRANDENBURG CO. 1917, 1930-35, 1937-38 Physical Description: [21]

Folder 42 Keivin BURNS 1912 Physical Description: [2]

Folder 43 BURROUGHS ADDING MACHINE CO. 1910-11, 1917 Physical Description: [5]

Frederick Hanley Seares Papers: mssSeares papers 9 Finding Aid Correspondence Correspondence: Bil - Carnegie Institution of Washington Division of Publications (1934)

Folder 44 Vannevar BUSH 1939-40 Physical Description: [4]

Folder 45 B -- MISCELLANEOUS (Backlund-Barrows) Physical Description: [48] Scope and Content Note {J. O. Backlund; Solon Irving Bailey; L. D. Bailiff; Baker & Taylor Co.; Bakersfield Californian; E. F. van de Sande Bakhuyzen; Ruth S. Bakker; A. C. Balch; Ralph R. Baldwin; P. Barrachi; Martha Barnum; John Barrett; Albert Lloyd Barrows}

Folder 46 B -- MISCELLANEOUS (Barthet's-Bliss) Physical Description: [46] Scope and Content Note {Barthet's Laboratory & Observatory; Raymond Bartholomew; William H. Barton, Jr.; Bautzen Observatory; Ernest H. Beattie; Wilhelm Becker; Otto Behrens; Belgium, Royal Observatory of; S. Beljawsky; Bell System Technical Journal; F. A. Bellamy; Andrew P. Beltran; Raine Bennett; Junior B. Benton; Berlin University Observatory; E. Bianchi; Claude R. Bird; Raymond Thayer Birge; Charles Bittinger; Vilhelm Bjerknes; Philip E. Bliss}

Folder 47 B -- MISCELLANEOUS (Bohlin-Burns) Physical Description: [36] Scope and Content Note {Karl Bohlin; N. Boneff; M. Thérèse Bonney; Andrew R. Boone; Henry Borsook; H. Bourget [incl ltr GEH ? HB]; Frederick Edward Brasch; Charles Breasted; Virginia Brenton [ltr Helen B. Pryor ? Monroe E. Deutsch; ltr FHS ? MED]; Alfred Brill; British Astronomical Association [W. Alfred Parr]; William Robert Brooks; W. Sterry Brown; Emile Bruguierel; Mrs. Roberdeau Buchanan; George J. Burns}

Folder 48 CALENDAR REFORM 1936 Physical Description: [6] Scope and Content Note [A. E. Kennelly; World Calendar Association, Inc.; Heber D. Curtis]

Folder 49 CAMBRIDGE UNIVERSITY PRESS 1910-11 Physical Description: [21]

Folder 50 William Wallace CAMPBELL 1909-13 Physical Description: [41]

Folder 51 William Wallace CAMPBELL 1914-18, 1920, 1922-23, 1927, 1930, 1935-38 Physical Description: [63] Scope and Content Note {folded}

Folder 52 Annie Jump CANNON 1912 Physical Description: [3]

Frederick Hanley Seares Papers: mssSeares papers 10 Finding Aid Correspondence Correspondence: Bil - Carnegie Institution of Washington Division of Publications (1934)

Folder 53 CARNEGIE INSTITUTION OF WASHINGTON -- DIVISION OF PUBLICATIONS (CIW-DOP) 1925-26, 1928-June 1929 Physical Description: [52] Scope and Content Note {Correspondents in this & following CIW-DOP folders are: Irving M. Grey; Frank F. Bunker; Esther Dodge; Alan McElligott; Ruth C. Shipman; Maya R. Grodskaya [Mrs. V. A. Grodsky]. folded}

Folder 54 CIW-DOP July 1929-June 1930 Physical Description: [63]

Folder 55 CIW-DOP July 1930-31 Physical Description: [40]

Folder 56 CIW-DOP 1932 Physical Description: [58]

Folder 57 CIW-DOP 1933-34 Physical Description: [73]

Box 3 Correspondence: Carnegie Institution of Washington Division of Publications (1935) - CH

Folder 58 CIW-DOP 1935 Physical Description: [47]

Folder 59 CIW-DOP Jan-June 1936 Physical Description: [47] Scope and Content Note {incl copy ms. "Evidence for an Expanding Universe," by Milton Lasalle Humason}

Folder 60 CIW-DOP July-Dec 1936 Physical Description: [63] Scope and Content Note {incl c.ltr ? Edwin P. Hubble ? J. C. Merriam; copies ms. "The Observational Approach to Cosmology," (Nov. 1936) based on EPH Oxford lectures; ltr EPH ? FHS w/ copies of ms. of EPH's 3 Oxford lectures (see above); ltr FHS ? EPH}

Folder 61 CIW-DOP Jan-June 1937 Physical Description: [66]

Folder 62 CIW-DOP July-Dec 1937 Physical Description: [45]

Folder 63 CIW-DOP Jan-June 1938 Physical Description: [37]

Folder 64 CIW-DOP July-Dec 1938 Physical Description: [78] Scope and Content Note {folded}

Frederick Hanley Seares Papers: mssSeares papers 11 Finding Aid Correspondence Correspondence: Carnegie Institution of Washington Division of Publications (1935) - CH

Folder 65 CIW-DOP 1939-40, 1942-45 Physical Description: [58]

Folder 66 CARNEGIE INSTITUTION OF WASHINGTON -- PRESS RELEASES 1936-37 Physical Description: [28] Scope and Content Note {Corresp: F. F. Bunker; Walter M. Gilbert}

Folder 67 Edwin Francis CARPENTER 1931, 1934-35, 1937 Physical Description: [15]

Folder 68 James McKeen CATTELL 1910-11, 1913, 1919, 1932, 1935-36, 1938 Physical Description: [31] Scope and Content Note {incl copy report "International Union for Co-operation in Solar Research, Fourth Conference," by Harold Delos Babcock}

Folder 69 CENTURY DICTIONARY 1910-11, 1913 Physical Description: [7]

Folder 70 C. V. L. CHARLIER 1911-14, 1917, 1928 Physical Description: [17]

Box 4 Correspondence: Co - D Additional Note The following folders 4.71-4.81 are applications from potential computers. These folders also contain various applicant's letters of reference. In some cases, Seares wrote to the applicant's professors requesting information about the person. These letters are filed under the name of the applicant. The correspondence in the first ten folders is arranged in alphabetical order by the last name of the applicant and mainly covers the period from 1909-1922. The last folder (4.81) is labeled "Recent" and has letters of application in alphabetical order received during the period 1922-1931.

Folder 71 COMPUTERS' APPLICATIONS: A-B Physical Description: [67] Scope and Content Note {Charlotte Bushnell Abbott; Julia Andrews; Dorothy Bach; Ruth E. Barnett; Della L. Bens; Mrs. Betty Trier Berry; Ronnie Best; Dorothy W. Block; Martha C. Borton; Anita Brown; Inez Mitchell [Mrs. S. M.] Brown; Keith Brown; Carolyn D. Burns [see also folder 48, A. J. CANNON]; Helen O. Burns}

Folder 72 COMPUTERS' APPLICATIONS: C-E Physical Description: [51] Scope and Content Note {Mabel Chilberg; Laura E. Christman; Edith Clarke; Frances Conder; Elizabeth Cooley; Marguerite Crowe; Park Davidson; Mary A. Davies; Helen Davis; Margaret Davis; Lois E. Denton; J. A. Duerksen; M. Margaret Elmer; Inez Ensign}

Frederick Hanley Seares Papers: mssSeares papers 12 Finding Aid Correspondence Correspondence: Co - D

Folder 73 COMPUTERS' APPLICATIONS: F-H Physical Description: [54] Scope and Content Note {Priscilla Fairfield; Bertrice Adelia Farrall; Elbertie Foudray; Mary Stuart Fretz; Caroline E. Furness; Alva Gardner; Louise Gellerman; C. D. Griffin; May Gundersen; Philippi H. Harding; Florence E. Harpham; Harriet Haskell; Julia M. Hawkes; Phyllis Hayford; Elva Henry; Adelaide M. Hobe; Myra D. Hoge; Sue W. Holland; Mary Howe; H. van Huijstee; Blanche Hulbert}

Folder 74 COMPUTERS' APPLICATIONS: J-K Physical Description: [16] Scope and Content Note {Louise Freeland Jenkins [+ photo]; Elizabeth T. Jones; Lois M. Keener; Harriet Knudsen}

Folder 75 COMPUTERS' APPLICATIONS: L-M Physical Description: [66] Scope and Content Note {Agnes Leek; Sophia Levy; Mary J. Lilly; Edna Lockridge; Gladys L. Long; Merl McClees; Florence MacCreadie; Marjorie Butterick Macgowgan; Christine McMartin; Maud W. Makemson; Isabel E. Martin; Beatrice W. Mayberry; Mary Maynard; Addie Miller; Mabel M. Miller; Anna Molander; Mrs. George S. Monk}

Folder 76 COMPUTERS' APPLICATIONS: N-P Physical Description: [35] Scope and Content Note {Ina M. Nelson; Hildur Österberg; Hannah Steele [Mrs. Edison] Pettit; Annie Pickles; Phoebe Poole; Katherine Prescott}

Folder 77 COMPUTERS' APPLICATIONS: R Physical Description: [27] Scope and Content Note {Ruth Ransom [+ photo]; Kathryn M. [Mrs. G. F.] Ray; Florence E. Rice; Myrtle L. Richmond; Gretchen Mary Ritchie}

Folder 78 COMPUTERS' APPLICATIONS: S Physical Description: [28] Scope and Content Note {E. B. Schumacher; Wanda Sheldon [Nichols]; Jessie M. Short; Caroline H. Smedley; Anita M. Squires;Florence J. Stocker; Ethel N. Stone; Ruth Atherton Stone [Robinson]}

Folder 79 COMPUTERS' APPLICATIONS: T-V Physical Description: [15] Scope and Content Note {Ardis E. Thomas; Lucile Upson; Elva Utzinger; Mabel Van Deusen}

Folder 80 COMPUTERS' APPLICATIONS: W Physical Description: [51] Scope and Content Note {Laura S. West; Mary H. Wilson; Lucile Winn; Edith H. Witherell; Coral Wolfe; Doris M. Wood}

Frederick Hanley Seares Papers: mssSeares papers 13 Finding Aid Correspondence Correspondence: Co - D

Folder 81 COMPUTERS' APPLICATIONS: RECENT Physical Description: [47] Scope and Content Note {Dorothy Applegate; Mae Benson; --Brant; Helen E. Chapin; Margaret Cunningham; Mabel E. Harrington; Mary Howe; Phoebe H. Leavens; Hazel Marie Losh; Elizabeth MacCormack; Mabel McCurdy; Maud Worcester Makemson; Wanda Sheldon [Mrs. E. C.] Nichols; Helen J. Roper; Dorothy L. Schwan; Marion E. Vosburgh}

Folder 82 COPYRIGHT 1938-39 Physical Description: [17] Scope and Content Note {Concerns FHS wanting to copyright an article which appeared in Isis in 1938. Corresp: George Sarton; Léon Guinet; Frank F. Bunker; C. L. Bouvé}

Folder 83 R. T. CRAWFORD 1910, 1914, 1916 Physical Description: [7]

Folder 84 R. H. CURTISS 1912 Physical Description: [4]

Folder 85 C -- MISCELLANEOUS (California-Christiania) Physical Description: [34] Scope and Content Note {California State Library; José da Silveira Camerino; Francis A. Campbell; Léon Cap; R. Stanley Capon; Ellsworth Carpenter; F. E. Carr; Carter Observatory [R. C. Hayes]; S. Chapman; Rev. Stanislaus Chevalier, S.J.; Christian Science Monitor [Robert K. Shellaby]; Christiania University Observatory}

Folder 86 C -- MISCELLANEOUS (Cirera-Coffman) Physical Description: [20] Scope and Content Note {Fr. R. Cirera, S.J.; Cpt. P. Civalleri, R.I.N.; Civic Bureau of Music and Art of Los Angeles; Claremont Colleges; Nell Ray Clarke; --Clasen; Gerald Coffman}

Folder 87 C -- MISCELLANEOUS (Collard-Cuffey) Physical Description: [34] Scope and Content Note {Aug. Collard; T. Collodi; F. Barrows Colton; Commission for Russian Scientists; A. Pribar de Conill; Duvall Cooper; Copernicus 450th Anniversary; Corning Glass Works; A. L. Cortie, S.J.; Robert Coughran; G. Cramer Dry Plate Co.; R. T. Crawford; Henry Crew; Raymond E. Crowtherb [Kodak, London]; James Cuffey}

Folder 88 Felix L. DAMES, Bookseller 1911 Physical Description: [2]

Folder 89 F. W. DYSON 1913-16, 1921-22 Physical Description: [8]

Frederick Hanley Seares Papers: mssSeares papers 14 Finding Aid Correspondence Correspondence: Co - D

Folder 90 D -- MISCELLANEOUS (Davis-Dickson) Physical Description: [21] Scope and Content Note {Dorothy N. Davis; Dartmouth College, Baker Memorial Library; L. P. Delsasso; Denver Public Library; Debrecen University Physical Institute; Rev. C. E. Deppermann, S.J.; Detroit Public Library; Deutsche Physikalische Gesellschaft; Deutsches Museum; L. E. Dickson}

Folder 91 D -- MISCELLANEOUS (Dingle-Dustheimer) Physical Description: [32] Scope and Content Note {Herbert Dingle [lecture & notes by FHS on "Science and the Unobservable"]; Harold B. Dirks; Roberta Lloyd [Mrs. Hugh T.] Dobbins [re S. Pike's grave]; Dorpat University Meteorological Observatory; E. Doublet; John C. Duncan; R. S. Dugan; Theodore Dunham, Jr.; Theodore Dufur; O. L. Dustheimer}

Box 5 Correspondence: E - F

Folder 92 EASTMAN KODAK COMPANY 1916, 1920, 1925, 1927-29, 1931, 1938 Physical Description: [20]

Folder 93 Arthur Stanley EDDINGTON 1920, 1925 Physical Description: [3]

Folder 94 Albert EINSTEIN 1926 Physical Description: [2]

Folder 95 ESCHENBACH PRINTING COMPANY 1920-22, 1924-25 Physical Description: [25] Scope and Content Note {re printing of Communications to the NAS}

Folder 96 EXHIBIT HALL -- DEDICATION 1937 Physical Description: [101] Scope and Content Note {includes folded newspaper clippings; letters of acceptance/regrets}

Folder 97 EXHIBITS 1938 Physical Description: [20] Scope and Content Note {folded. layouts & descriptions of exhibits on supernovae; sunspots, & Jupiter's moons}

Folder 98 EXHIBITS, ETC. Physical Description: [24] Scope and Content Note {Incl. CIW-MWO exhibit, Dec. 1931}

Frederick Hanley Seares Papers: mssSeares papers 15 Finding Aid Correspondence Correspondence: E - F

Folder 99 E -- MISCELLANEOUS Physical Description: [42] Scope and Content Note {C. Easton; J. M. Eder; Frank K. Edmondson; W. S. Eichelberger; Greta Ekelöf; Ferdinand Ellerman [ltrs re FE's death: George E. Johnson ? FHS; FHS ? GEJ]; C. T. Elvey; Pio Emanuelli; Encyclopaedia Britannica [W. L. Dalton]; S. Enebo; Wilhelm Engelman, Publisher; Eugene H. Eyster}

Folder 100 Charles FABRY 1920, 1938 Physical Description: [2]

Folder 101 E. A. FATH 1912-14, 1925, 1928 Physical Description: [18] Scope and Content Note {Incl typed ms. "A Study of Nebulae"}

Folder 102 John Adam FLEMING 1934-36 Physical Description: [15] Scope and Content Note {incl c.2 ltr JAF ? J. C. Merriam; c.ltr JAF ? S. B. Nicholson}

Folder 103 Gustav FOCK, Bookdealer 1909-12 Physical Description: [34]

Folder 104 Gustav FOCK, Bookdealer 1913-14, 1924 Physical Description: [29]

Folder 105 Frederick E. FOWLE 1931 Physical Description: [5]

Folder 106 Philip FOX 1912-14, 1916-17, 1929-30, 1940 Physical Description: [36]

Folder 107 Florence FREEMAN 1906, 1911 Physical Description: [4]

Folder 108 Edwin Brant FROST 1919-21 Physical Description: [25]

Folder 109 Edwin Brant FROST 1922-23, 1925 Physical Description: [27]

Folder 110 Edwin Brant FROST 1926-27 Physical Description: [44]

Folder 111 Edwin Brant FROST 1928-29 Physical Description: [34]

Folder 112 Edwin Brant FROST 1930 Physical Description: [23]

Folder 113 Edwin Brant FROST 1931-32 Physical Description: [32]

Frederick Hanley Seares Papers: mssSeares papers 16 Finding Aid Correspondence Correspondence: E - F

Folder 114 Caroline E. FURNESS 1910, 1912, 1914 Physical Description: [11] Scope and Content Note {re potential computers}

Folder 115 F -- MISCELLANEOUS (Farnsworth-Forsythe) Physical Description: [21] Scope and Content Note {Alice H. Farnsworth; Max Farrand; V. L. Fasschel; Anna Mary Felker; Ann Walker [Mrs. James B.] Field; P. H. Field; Howard Finley; John Forsyth; W. E. Forsythe}

Folder 116 F -- MISCELLANEOUS (Fracassini-Fulcher) Physical Description: [22] Scope and Content Note {Cesare Serafini Fracassini; Franklin Institute; French Consul, San Francisco; Gordon S. Fulcher}

Box 6 Correspondence: G - Gilbert (1920)

Folder 117 WILLIAM GAERTNER & COMPANY 1910-11 Physical Description: [23] Scope and Content Note {+photo}

Folder 118 Henry Gordon GALE 1910-12 Physical Description: [38]

Folder 119 Henry Gordon GALE 1913 Physical Description: [56]

Folder 120 Henry Gordon GALE 1914 Physical Description: [47]

Folder 121 Henry Gordon GALE 1915-16, 1920 Physical Description: [32]

Folder 122 Henry Gordon GALE 1921-25, 1931, 1935 Physical Description: [63]

Folder 123 Andreas GALLE 1910-12 Physical Description: [30] Scope and Content Note {re purchase of J. Galle's Library}

Folder 124 Boris P. GERASIMOVI C 1928-30, 1932-33 Physical Description: [8]

Folder 125 James T. GEROULD 1909-10, 1913, 1925 Physical Description: [7]

Folder 126 Walter M. GILBERT 1910-June 1913 Physical Description: [31]

Frederick Hanley Seares Papers: mssSeares papers 17 Finding Aid Correspondence Correspondence: G - Gilbert (1920)

Folder 127 Walter M. GILBERT July 1913-June 1914 Physical Description: [38]

Folder 128 Walter M. GILBERT July 1914-1915 Physical Description: [37]

Folder 129 Walter M. GILBERT 1916 Physical Description: [38]

Folder 130 Walter M. GILBERT 1917 Physical Description: [28]

Folder 131 Walter M. GILBERT 1918 Physical Description: [19]

Folder 132 Walter M. GILBERT Jan-June 1919 Physical Description: [29]

Folder 133 Walter M. GILBERT July-Dec 1919 Physical Description: [19]

Folder 134 Walter M. GILBERT 1920 Physical Description: [34]

Box 7 Correspondence: Gilbert (1921)- Hai

Folder 135 Walter M. GILBERT 1921 Physical Description: [46]

Folder 136 Walter M. GILBERT 1922 Physical Description: [47]

Folder 137 Walter M. GILBERT 1923 Physical Description: [28]

Folder 138 Walter M. GILBERT 1924 Physical Description: [57]

Folder 139 Walter M. GILBERT 1925 Physical Description: [18]

Folder 140 Walter M. GILBERT 1926 Physical Description: [20]

Folder 141 Walter M. GILBERT 1927-28 Physical Description: [34]

Folder 142 Walter M. GILBERT 1929-30 Physical Description: [38]

Folder 143 Walter M. GILBERT 1931-33 Physical Description: [24]

Frederick Hanley Seares Papers: mssSeares papers 18 Finding Aid Correspondence Correspondence: Gilbert (1921)- Hai

Folder 144 Walter M. GILBERT 1934-40, 45 Physical Description: [65]

Folder 145 Sir David GILL 1909-10 Physical Description: [2]

Folder 146 George W. GRAY 1936-37 Physical Description: [21]

Folder 147 Jesse Leonard GREENSTEIN 1935, 1938 Physical Description: [5]

Folder 148 Clementina deForest GRIFFIN 1910-11, 1918 Physical Description: [15]

Folder 149 GRIMES-STASSFORTH STATIONERY COMPANY 1910-11, 1918 Physical Description: [12]

Folder 150 WILLIAM H. GUILD & COMPANY 1909-11 Physical Description: [25]

Folder 151 WILLIAM H. GUILD & COMPANY 1912-13 Physical Description: [37]

Folder 152 WILLIAM H. GUILD & COMPANY 1914-17, 1920 Physical Description: [47]

Folder 153 G -- MISCELLANEOUS (Gabba-Gilder) Physical Description: [39] Scope and Content Note {L. Gabba; Galileo Portrait [Charles E. Lewis]; Joaquín Gallo; H. A. Garfield; Willard H. Garrett; G. N. Garrison; General Petroleum Corp. of California; Georgia Astrophysical Observatory; F. Louise Gianetti; Henry L. Giclas; Millicent Gilder}

Folder 154 G -- MISCELLANEOUS (Gillette-Guth) Physical Description: [38] Scope and Content Note {Halbert P. Gillette; Curvin H. Gingrich; F. Gonnessiat; Katharine Gordon; W. B. Gordon; Göttingen Observatory/Library; Lucien Gougy; L. Grabowski; Carlos Graef [Fernández]; K. Graff; John Grant; Graphic Arts Press [J. Stuart Lynch]; W. de Groot; George R. Grose; H. Grouiller; Frederick O. Grover [re extra-terrestrial life]; F. A. Guth}

Folder 155 Rev. J. G. HAGEN, S.J. 1912, 1919, 1922 Physical Description: [6]

Folder 156 Jessica May HAINES 1909-10, 1913 Physical Description: [18]

Box 8 Correspondence: Hal - IAU (July 1919)

Frederick Hanley Seares Papers: mssSeares papers 19 Finding Aid Correspondence Correspondence: Hal - IAU (July 1919)

Folder 157 George Ellery HALE 1910, 1912-16 Physical Description: [40] Scope and Content Note {folded}

Folder 158 George Ellery HALE 1917-21 Physical Description: [36] Scope and Content Note {incl ltr W. J. Hanna ? FHS}

Folder 159 George Ellery HALE 1922, 1925-26, 1928, 1931-32, 1934-36 Physical Description: [37] Scope and Content Note {incl notes on "Cost Estimate for Expedition to Southern Hemisphere," c. June, 1922. folded}

Folder 160 HAMBURG OBSERVATORY 1910, 1935, 1937-38 Physical Description: [10]

Folder 161 E. S. HAYNES 1910, 1912, 1914-15, 1917, 1919-23, 1925, 1928 Physical Description: [24]

Folder 162 W. HEFFER & SONS, LTD. 1912-13, 1915-17 Physical Description: [9]

Folder 163 A. HERMANN ET FILS Libraire Scientifique 1910-11, 1913-14 Physical Description: [10]

Folder 164 Ejnar HERTZSPRUNG 1911-12, 1914-15, 1917, 1919-23, 1925, 1928 Physical Description: [38]

Folder 165 Helen Elizabeth HIGH 1912, 1915 Physical Description: [14]

Folder 166 Bernard HOFFMANN 1916, 1923, 1927 Physical Description: [7]

Folder 167 Edward Singleton HOLDEN 1912 Physical Description: [8]

Folder 168 Sture HOLM 1933-34 Physical Description: [6]

Folder 169 Janet HOWELL 1916-17 Physical Description: [13]

Folder 170 Edwin Powell HUBBLE 1924, 1926 Physical Description: [2]

Folder 171 Leon HUFNAGEL 1931-32 Physical Description: [6]

Frederick Hanley Seares Papers: mssSeares papers 20 Finding Aid Correspondence Correspondence: Hal - IAU (July 1919)

Folder 172 H -- MISCELLANEOUS (Hagemann-Hassenstein) Physical Description: [35] Scope and Content Note {F. G. Hagemann; H. M. Hall; J. Halm; Hamburg Seewarte; Richard Hamer; W. J. Hanna; E. Hartwig; Georg Hartwig; Harvard College Observatory; Herbert Harvey; Margaret Harwood; W. Hassenstein}

Folder 173 H -- MISCELLANEOUS (Havens-Hirsch) Physical Description: [25] Scope and Content Note {W. H. Havens; Alan S. Hawksworth; E. R. Hedrick; Paul Helbronner; Rollin D. Hemans; St. Hempel; Abel Heywood and Son; "Herschel Portrait" [A. O. Leuschner; Louis J. Carmel]; Elsie Isabel Hill; F. W. Hinrichs, Jr.; Shiu Hirayama; E. Hirsch}

Folder 174 H -- MISCELLANEOUS (Hodam-Hutchins) Scope and Content Note {Joseph A. Hodam; C. Hoffmeister; Helen Sawyer Hogg; Melvin J. Hoirch; Hong Kong Royal Observatory; Inga Howard; Herbert A. Howe; J. Huizinga; Beatrice M. Humason; W. J. Hussey; Robert Maynard Hutchins}

Folder 175 ILFORD, LTD. 1912-13 Physical Description: [9] Scope and Content Note {F. F. Renwick; re photographic emulsions}

Folder 176 INSURANCE -- CARNEGIE INSTITUTION OF WASHINGTON Physical Description: [2]

Folder 177 INTERNATIONAL ASTRONOMICAL UNION (IAU) March-July 17, 1919 Physical Description: [39] Scope and Content Note {Concerns meeting of American section of proposed IAU in March 1919 & preparations for Brussels meeting of proposed IAU on July 18, 1919. Corresp: Joel Stebbins; S. I. Bailey; F. C. Jordan; J. A. Parkhurst; W. W. Campbell}

Folder 178 IAU (Meeting in Brussels, July 1919 Physical Description: [23] Scope and Content Note {folded}

Box 9 Correspondence: IAU (September 1919-1937)

Folder 179 IAU Sept, 1919-Dec, 1920 Physical Description: [26] Scope and Content Note {Corresp: A. Fowler; Joel Stebbins; W. W. Campbell; J. A. Parkhurst; H. Leavitt; H. H. Turner; J. Halm; P. J. Melotte; Frank Dyson}

Frederick Hanley Seares Papers: mssSeares papers 21 Finding Aid Correspondence Correspondence: IAU (September 1919-1937)

Folder 180 IAU 1921 Physical Description: [40] Scope and Content Note {Corresp: A. Fowler; H. Spencer-Jones; Henrietta S. Leavitt; Harlow Shapley; R. A. Sampson; Joel Stebbins; W. W. Campbell; Frank Dyson; J. A. Parkhurst; J. Baillaud; P. J. Melotte; H. H. Turner. folded, oversize}

Folder 181 IAU 1922 Physical Description: [44] Scope and Content Note {Corresp: Harlow Shapley; A. Fowler; J. A. Parkhurst; H. H. Turner; J. G. Hagen; H. Spencer-Jones; J. Baillaud; A. S. Eddington; R. A. Sampson; J. Halm; J. Stebbins; W. W. Campbell. folded}

Folder 182 IAU (Reports & Printed matter) 1922 Physical Description: [17] Scope and Content Note {Material from U.S. section meeting on April 1922 & Rome meeting on May 1922. One with brass paper fasteners. folded}

Folder 183 IAU 1924-25 Physical Description: [36] Scope and Content Note {Corresp: A. Fowler; P. J. van Rhijn; R. A. Sampson; W. Dziewulski; J. G. Hagen; Robert H. Baker; Joel Stebbins; Harlow Shapley; Ejnar Hertzsprung; H. Spencer-Jones; J. A. Parkhurst. One thick item with 3 staples. folded}

Folder 184 IAU 1931-32 Physical Description: [75] Scope and Content Note {Corresp: F. J. M. Stratton; P. J. van Rhijn; A. Bemporad; R. A. SAmpson; P. J. Melotte; H. L. Vanderlinden; Bertil Lindblad; H. Plaskett; Östen Bergstrand; W. M. H. Greaves; Raymond S. Dugan; Harlow Shapley; Charles Fabry; Cecilia H. Payne; W. Hassenstein; J. Hellerich; K. Graff; Ejnar Hertzsprung; H. Spencer-Jones; A. Pannekoek; H. von Zeipel; K. G. Malmquist; W. K. Green; Gilbert Rougier. folded}

Folder 185 IAU 1933-37 Physical Description: [30] Scope and Content Note {Corresp: F. J. M. Stratton; J. H. Oort; Jules Baillaud; P. J. van Rhijn; H. Shapley; Jan Schilt; W. Hassenstein; Cecilia Payne-Gaposchkin; S. A. Mitchell}

Box 10 Correspondence: IAU (1938) - Kapteyn, 1914 The following six folders, Folders 189-194, contain correspondence relating to the 1910 IUCSR meeting in Pasadena. The material is arranged in alphabetical order by named correspondent. Most of the letters are acceptances/regrets, but there are some that detail the organizing plans.

Frederick Hanley Seares Papers: mssSeares papers 22 Finding Aid Correspondence Correspondence: IAU (1938) - Kapteyn, 1914

Folder 186 IAU 1938 Physical Description: [29] Scope and Content Note {Corresp: WSA; E. Hertzsprung; J. H. Oort; Bertil Lindblad; Cecilia Payne-Gaposchkin. Several ltrs to FHS are incorporated in a draft ms. for the Commission 25 report of 1938; these are from: W. Baade; Cecilia Payne-Gaposchkin; P. Guthnick; B. Lindblad; Yngve Öhlman; F. E. Ross; J. Schilt; H. Shapley; B. Sternberk; P. J. van Rhijn; K. Graff; J. Hellerich; K. G. Malmquist; S. A. Mitchell. folded & oversize.}

Folder 187 INTERNATIONAL CRITICAL TABLES 1923-25, 1931 Physical Description: [35]

Folder 188 INTERNATIONAL UNION FOR CO-OPERATION IN SOLAR RESEARCH (IUCSR) Pasadena meeting, 1910 Physical Description: [37] Scope and Content Note {Concerns 4th IUCSR meeting held at Mt. Wilson from Aug. 29 to Sep. 6, 1910. Contains programs, lists of attendees, etc.}

Folder 189 IUCSR Correspondence (Bailey-Byrne) Physical Description: [21] Scope and Content Note {S. I. Bailey; M. J. Balcello; Robert S. Ball; Carl Barus; Louis Agricola Bauer; A. Belopolsky; A. Bemporad; Pietro Blaserna; Henry Bourget; H. R. Boynton; H. Buisson; J. J. Byrne}

Folder 190 IUCSR Correspondence (Chamberlin-Goldhammer) Physical Description: [22] Scope and Content Note {T. C. Chambelin; C. A. Chant; G. A. Clark; W. W. Coblentz; A. Cotton; R. T. Crawford; Henry Crew; J. Danne; Arthur L. Day; H. Deslandres; A. Donner; F. W. Dyson; H. Ebert; Mrs. W. P. Fleming; E. Gehrcke; H. M. Goodwin; D. Goldhammer}

Folder 191 IUCSR Correspondence (Hallock-Küstner Physical Description: [23] Scope and Content Note {William Hallock; B. Harkányi; M. Harny; Karl Haussmann; Arthur R. Hinks; W. P. Hoge; Eliza P. Houghton; W. J. Humphreys; R. J. A. Innes; David Starr Jordan; Edward Bell Knobel; Otto Knopf; Friedrich Küstner}

Folder 192 IUCSR Correspondence (Lampland-Pickering) Physical Description: [34] Scope and Content Note {C. O. Lampland; E. Percival Lewis; Frank B. Littell; Percival Lowell; H. G. Lyons; Maryland [Hotel]; E. Miller; G. Millochau; A. A. Nijland; Johann Palisa; Louis A. Parsons; J. E. Petavel; E. C. Pickering [incl c.2 ltrs S. W. Manning Fletcher ? S. I. Bailey; c.ltrs ECP ?? P. Lowell]}

Folder 193 IUCSR Correspondence (Plaskett-Schuster) Physical Description: [34] Scope and Content Note {J. S. Plaskett; E. Pringsheim; Hugh B. Rice, Co.; A. Lawrence Rotch; C. Runge; J. R. Rydberg; Fernando Sanford; J. A. B. Scherer; Arthur Schuster [incl ltr Mrs. Schuster ? FHS]}

Frederick Hanley Seares Papers: mssSeares papers 23 Finding Aid Correspondence Correspondence: IAU (1938) - Kapteyn, 1914

Folder 194 IUCSR Correspondence (Schwarzschild-Wiedemann) Physical Description: [30] Scope and Content Note {Karl Schwarzschild; Arthur Searle; Frederick Slocum; Southern California Academy of Sciences [Holdridge O. Collins]; Ormond Stone; Tiffany & Co.; University Club of Pasadena [R. I. Howe; Esward L. Mayberry]; Felipe Valle; J. Violle; E. Warburg; A. B. Wills; A. Wolfer; E. Wiedemann}

Folder 195 I -- MISCELLANEOUS Physical Description: [32] Scope and Content Note {Ibérica; Indian Academy of Sciences [M. N. Saha]; Institut d'Astronomique Pratique, Warsaw, Poland; Institut d'Optique; Institut de Physique du Globe, Paris [Ch. Maurain]; Institute of International Education; International Catalogue of Scientific Literature; International Education Board [re grant for AAVSO]; International Magazine Co.; International Press Service; Irving-Pitt Manufacturing Co.; Dorothea Isaac-Roberts}

Folder 196 James H. JEANS 1927 Physical Description: [2]

Folder 197 J -- MISCELLANEOUS Physical Description: [35] Scope and Content Note {J. Jackson; Harold Jacoby; Hamilton M. Jeffers; Frank B. Jewett; N. Jewdokimow; Johns Hopkins Press/University; William Templeton Johnson; Robert Jonckheer; T. T. Jones Co.; Frederick C. Jordan; L. V. Julihn [incl ltr F. G. Cottrell ? FHS]; W. Junk, Publishers}

Folder 198 Waldemar KAEMPFFERT 1929, 1936-38 Physical Description: [15] Scope and Content Note {See also New York Times}

Folder 199 Jacobus Cornelius KAPTEYN 1909-10 Physical Description: [17] Scope and Content Note {incl 2 photos}

Folder 200 Jacobus Cornelius KAPTEYN 1911-14 Physical Description: [38] Scope and Content Note {incl 2 ltrs FHS ? Mr. Zernicke}

Box 11 Correspondence: Kapteyn (1915) - Mag

Folder 201 Jacobus Cornelius KAPTEYN 1915-16 Physical Description: [34] Scope and Content Note {incl c.ltr JCK ? GEH; c.ltr R. J. A. Innes ? JCK; ltr FHS ? William Barnum; ltr WB ? FHS}

Folder 202 Jacobus Cornelius KAPTEYN 1917-18 Physical Description: [22]

Frederick Hanley Seares Papers: mssSeares papers 24 Finding Aid Correspondence Correspondence: Kapteyn (1915) - Mag

Folder 203 Jacobus Cornelius KAPTEYN 1919-22 Physical Description: [27]

Folder 204 Arthur S. KING 1915, 17-18 Physical Description: [12]

Folder 205 Edward S. KING 1913, 1916 Physical Description: [2]

Folder 206 William H. KNIGHT 1911-12, 1916 Physical Description: [4]

Folder 207 Peter Paul KOCH 1913-14 Physical Description: [4]

Folder 208 Arnold KOHLSCHÜTTER 1925 Physical Description: [3]

Folder 209 E. KÖNIG 1914 Physical Description: [1] Scope and Content Note {re dyes for photographic plates}

Folder 210 Karl KOSTERSITZ 1913-17, 1923-24, 1926, 1928-30, 1934 Physical Description: [25]

Folder 211 E. A. KREIKEN 1921, 1930-31, 1936-37 Physical Description: [14]

Folder 212 Gerard Peter KUIPER 1938, 1941 Physical Description: [4]

Folder 213 K -- MISCELLANEOUS (Kammerlingh-Keystone) Physical Description: [28] Scope and Content Note {--Kammerlingh-Onnes; "Kapteyn Cottage"; B. Karpov; Katherine P. Kaster; Kasan University Astronomical Observatory; Katherine P. [Mrs. H. B.] Kaster; J. Kater; Heinrich Kayser; C. H. Kelley; Hugh J. Kelly; Roy J. Kennedy; Norton A. Kent; Frederick P. Keppel; M. de Kerolyr; Keystone View Co. of New York, Inc. [F. Lorenz]}

Folder 214 K -- MISCELLANEOUS (Kienle-Kuhlmann) Physical Description: [32] Scope and Content Note {H. Kienle; M. F. Kimball; Mrs. W. L. Kinney; Otto Knopf; H. Knox-Shaw; Kobe Imperial Marine Observatory; K. F. Koehlers Antiquarium; --Konkoly; Kosmos; Kranseder & Co., Gmbh; Jan Krassowski; --Krater; Adolf Krause; C. J. Krieger; Hillier Krieghbaum; A. F. Kuhlman}

Folder 215 H. E. LAU 1917 Physical Description: [5]

Folder 216 Henrietta S. LEAVITT 1914-15 Physical Description: [2]

Frederick Hanley Seares Papers: mssSeares papers 25 Finding Aid Correspondence Correspondence: Kapteyn (1915) - Mag

Folder 217 Oliver J. LEE 1925, 1933, 1935 Physical Description: [10]

Folder 218 Frederick C. LEONARD 1923, 1927, 1932-33, 1936 Physical Description: [12]

Folder 219 Armin Otto LEUSCHNER 1910-13, 1916 Physical Description: [18]

Folder 220 Armin Otto LEUSCHNER 1928, 1930, 1935-36, 1938-39 Physical Description: [27] Scope and Content Note {incl ltrs Nora Moylan ?? FHS}

Folder 221 LIBRARIAN APPLICATIONS 1916 Physical Description: [34] Scope and Content Note {Elizabeth Connor; Belle Blend; Frederick E. Brasch; Irene de Camp; Eva W. Graves; Frances H. Kahl; Rebecca S. MacNair; Victor E. Marriott; Glyde Maynard; Fanny L. Parker; Elizabeth A. Riesner; I. Serrurier; Helen D. Weingarth}

Folder 222 LIBRARY BUREAU 1909-11 Physical Description: [9]

Folder 223 LIFE Magazine 1937-38, 1940 Physical Description: [17]

Folder 224 Bertil LINDBLAD 1934-38 Physical Description: [9]

Folder 225 William J. S. LOCKYER 1909-10 Physical Description: [3]

Folder 226 Knut LUNDMARK 1932-34 Physical Description: [6]

Folder 227 L -- MISCELLANEOUS (Lal-Liebisch) Physical Description: [37] Scope and Content Note {G. B. Lal; Lancaster Press, Inc. [O. J. Smith, Jr.]; Hugo Landi; R. J. Lang; Sir Joseph Larmor; Jennie B. Lasby; Latvia University Astronomical Observatory, Riga [S. Slaucitajs]; G. Lecointe; H. Lehmann; Lemcke & Buechner; George H. Lepper; Sophia H. Levy; Lick Observatory; Bernhard Liebisch}

Folder 228 L -- MISCELLANEOUS (Limes-Lwow) Physical Description: [30] Scope and Content Note {Charles L. Limes; E. M. Lindsay; Charles B. Lipman; Charles G. Little; L. C. Lonyo; Rafael Obregon Loria; Los Angeles Board of Park Commissioners; Los Angeles Civic Bureau of Music and Art; Los Angeles Times [G. L. Goodmansen]; Hazel Marie Losh; Katheryn Lowe [incl ltr Irving M. Grey ? FHS]; Percival Lowell; Robert L. Lucas; --Luppo-Cramer; Lwow Astronomical Institute}

Frederick Hanley Seares Papers: mssSeares papers 26 Finding Aid Correspondence Correspondence: Kapteyn (1915) - Mag

Folder 229 Adriaan van MAANEN 1910, 1912 Physical Description: [5] Scope and Content Note {incl memo GEH ? AvM; memo AvM ? E. Wilhoit; tlgrm FHS ? GEH}

Folder 230 MACK PRINTING CO. 1926-29, 1933 Physical Description: [9] Scope and Content Note {Corresp: Cyrus S. Fleck}

Folder 231 Robert Raynolds McMATH 1935, 1937-39 Physical Description: [32]

Folder 232 MAGNITUDES AND COLORS OF STARS NORTH OF +80? -- Correspondence 1940-42 Physical Description: [37] Scope and Content Note {folded. Corresp: Dorothy R. Swift; Mrs. V. A. Grodsky; Bart J. Bok}

Box 12 Correspondence: Mar - Mz

Folder 233 MARSHALL-JACKSON CO. 1911 Physical Description: [6]

Folder 234 MASSON & CIE., Editeurs 1912-13 Physical Description: [5]

Folder 235 Nicholas Ulrich MAYALL 1929, 1932 Physical Description: [9]

Folder 236 MAYER & MüLLER 1911-14 Physical Description: [12]

Folder 237 Charles Edward Kenneth MEES 1914-16, 1922, 1930, 1932, 1935 Physical Description: [44] Scope and Content Note {folded}

Folder 238 MERIDIEN GRAVURE CO. Physical Description: [20] Scope and Content Note {incl "Full-Tone Collotype for Scientific Reproduction," Supplements 6-13; reprint of "Photographic Studies of Nebulae," by John Charles Duncan w/ samples of photo collotype}

Folder 239 John Campbell MERRIAM 1921-23, 1925, 1928 Physical Description: [21] Scope and Content Note {incl tlgrms J. L. Wirt ?? D. S. Mulvin}

Folder 240 John Campbell MERRIAM 1931-33, 1935 Physical Description: [26]

Frederick Hanley Seares Papers: mssSeares papers 27 Finding Aid Correspondence Correspondence: Mar - Mz

Folder 241 John Campbell MERRIAM 1936 Physical Description: [16]

Folder 242 John Campbell MERRIAM 1937-39 Physical Description: [44] Scope and Content Note {incl c.tlgrm WSA ? JCM; c.tlgrm F. E. Wright ? D.W. Pierce, Jr.}

Folder 243 Albert Abraham MICHELSON 1928-29, 1935 Physical Description: [11] Scope and Content Note {incl ltrs FHS ?? Alhambra Foundry Co., Ltd.}

Folder 244 A. MIETHE 1912 Physical Description: [6]

Folder 245 MILLIONAIRE CALCULATING MACHINE 1910-11, 1917, 1921-23, 1932 Physical Description: [45] Scope and Content Note {Corresp: W. A. Morschhauser; Business Equipment Sales Co., Inc.; J. P. Warren [Felt & Tarrant Mfg. Co., later the Annotator Manufacturing Co.]; E. L. Hoffman}

Folder 246 Henri MINEUR 1930-31, 1933 Physical Description: [5]

Folder 247 Samuel Alfred MITCHELL 1916, 1922-23, 1937, 1939-40 Physical Description: [15] Scope and Content Note {incl c.brief by Raymond M. Hughes on the Administration of the U. S. Naval Observatory [1939]}

Folder 248 George Spencer MONK 1916-17 Physical Description: [5] Scope and Content Note {incl ltr Ardis T. [Mrs. G. S.] Monk}

Folder 249 Charlotte Emma MOORE [Sitterly] 1929-34, 1937-39 Physical Description: [45]

Folder 250 M -- MISCELLANEOUS (McArthur-Marquis) Physical Description: [40] Scope and Content Note {Albert Chase McArthur; Macbeth Daylighting Co., Inc. [Norman Macbeth]; Lucena McBride; Phoebe Merl McClees [ltrs M. E. Churchill ?? FHS; FHS ? Fisk Teachers' Agencies]; Frank McCoy; E. C. MacDowell; Anita Newcomb McGee; McGill University; Dean B. McLaughlin; MacMillan Co. Publishers [Rose Levy]; Mrs. John McMillan; Maud W. Makemson; E. Mallinckrodt, Jr.; Marburg University Library; Marchaut Calculating Machine Co. [folded]; W. L. Marcy; Marina, Instituto y Observatorio de; Marquis, A. N. & Co.}

Frederick Hanley Seares Papers: mssSeares papers 28 Finding Aid Correspondence Correspondence: Mar - Mz

Folder 251 M -- MISCELLANEOUS (Marsh-Miller) Physical Description: [50] Scope and Content Note {Donald G. Marsh; Hannah Mary Marsh; Thomas Marshall, Jr. [folded]; Massachusetts Institute of Technology Library; Masson and Co.; T. M. Martin; T. Matukama; A. S. D. [Mrs. T. F.] Maunder; Thomas Frid Maunder; Oscar Maurer; R. Newton Mayall; Edward L. Mayberry; Carroll B. Merritt; W. F. Meyer; A. A. Michailovsky; G. R. Miczaika; Dayton C. Miller; Freeman D. Miller; H. L. Miller; John A. Miller; Mrs. John Miller}

Folder 252 M -- MISCELLANEOUS (Millikan-Mundt) Physical Description: [59] Scope and Content Note {R. A. Millikan; Monroe Calculating Machine Co. [folded. incl Calculator Equipment Corp.]; Montevideo, Observatory of the University of [folded]; Monthly Weather Review; Joseph Monti; K. Moór [?]; Ernest C. Moore; Morava Construction Co.; D. W. Morehouse [incl ltr H. Shapley ? DWM]; D. P. Moreton; G. W. Morey; --Moriceau; T. H. Morgan; Sylvanus G. Morley; W. D. Morrison; Albert G. Mowbray [incl memo EPH ? FHS]; F. R. Moulton; Z. Müller; Carlos S. Mundt}

Box 13 Correspondence: N - Q

Folder 253 Jason John NASSAU 1935, 1937 Physical Description: [5]

Folder 254 NATURE 1925-27, 1932 Physical Description: [10]

Folder 255 NAVAL OBSERVATORY, U.S. 1909-12, 1916 Physical Description: [10]

Folder 256 NEWTON CELEBRATION 1927 Physical Description: [14] Scope and Content Note {Concerns Bi-centenary of Newton's death, celebrated at Columbia University on Nov. 1927. Corresp: Frederick E. Brasch; A. O. Leuschner; E. W. Brown; W. W. Campbell}

Folder 257 NEW YORK TIMES 1930, 1935, 1938 Physical Description: [12] Scope and Content Note {--Markel; Waldemar Kaempffert; C. M. Graves; V. W. Talley; Edwin L. James}

Folder 258 N -- MISCELLANEOUS (Nantucket-National) Physical Description: [27] Scope and Content Note {Nantucket Maria Mitchell Association; A. L. Narayan; National Broadcasting Co., Inc. [J. G. Strang]; National City Bank of New York; National Economic League [J. W. Beatson]; National Geographic Society; National Library of Peiping [T. L. Yuan]; National Research Council [M. Stambaugh]; National Research Council of Japan [H. Honda]; National Tsing Hua University}

Frederick Hanley Seares Papers: mssSeares papers 29 Finding Aid Correspondence Correspondence: N - Q

Folder 259 N -- MISCELLANEOUS (Neuner-Nijland) Physical Description: [21] Scope and Content Note {The Neuner Co.; New Hampshire, University of [George N. Bauer]; News Chronicle [Robert Waithman]; Newton & Co., Ltd. [A. J. Batchelor]; New York Public Library [R. J. Lingel]; New York State Library [Gladys T. Jones]; Mrs. Wanda Sheldon Nichols; Seth Barnes Nicholson; A. A. Nijland}

Folder 260 N -- MISCELLANEOUS (Nikolayev-Noyes) Physical Description: [17] Scope and Content Note {Nikolayev Astronomical Observatory [L. Semenov]; Nixdorf Observatory; Charles A. Noble; Gladys Noon; H. Nort; Norwegian Meteorological Institute [folded]; Werner Nowachi; Arthur A. Noyes}

Folder 261 Jan Hendrik OORT 1936-37, 1939 Physical Description: [7]

Folder 262 O -- MISCELLANEOUS Physical Description: [21] Scope and Content Note {Oberlin College [F. E. Carr; Emma L. Frank]; Sir Frederick O'Connor; J. Ogden; R. M. Ogden; Yngve Öhlman; Eleanor Olney; John Ohlsson; William Tyler Olcott [& G. H. Lutz]; Charles P. Olivier; P. Th. Oosterhoff; Earle L. Ovington}

Folder 263 Johann PALISA 1910, 1912 Physical Description: [12]

Folder 264 John Adelbert PARKHURST 1910-11, 1913-15, 1921, 1923 Physical Description: [38]

Folder 265 Cecilia Helena PAYNE (-GAPOSCHKIN) 1931, 1933, 1935, 1938 Physical Description: [9]

Folder 266 Francis Gladheim PEASE 1938-39 Physical Description: [41] Scope and Content Note {Concerned with matters following Pease's death and with his widow. Corresp: George E. Johnson [TIAA]; Mrs. Caroline Pease; George M. Furness; Anne Kneeland [Mrs. J. C.] Swinson; William A. Furness}

Folder 267 Edison PETTIT 1927, 1934 Physical Description: [5] Scope and Content Note {folded}

Folder 268 Edward Charles PICKERING 1909-June 1910 Physical Description: [24] Scope and Content Note {incl material by Henrietta S. Leavitt}

Frederick Hanley Seares Papers: mssSeares papers 30 Finding Aid Correspondence Correspondence: N - Q

Folder 269 Edward Charles PICKERING July-Dec 1910 Physical Description: [23] Scope and Content Note {+ 9 photos; Incl material by H. S. Leavitt}

Folder 270 Edward Charles PICKERING 1911 Physical Description: [22] Scope and Content Note {incl material by Henrietta S. Leavitt}

Folder 271 Edward Charles PICKERING 1912-13 Physical Description: [30]

Folder 272 Edward Charles PICKERING 1914-17 Physical Description: [25] Scope and Content Note {Incl material by H. S. Leavitt}

Folder 273 Sidney R. PIKE 1928 Physical Description: [12] Scope and Content Note {ltrs concern the sudden illness of Pike, an International Education Board Fellow at Mt. Wilson, which led to his death. Corresp: WSA; Trevor R. Arnett [IEB]; Wallace Lund}

Folder 274 John Stanley PLASKETT 1922, 1932, 1935-36 Physical Description: [9]

Folder 275 H. C. PLUMMER 1917 Physical Description: [10] Scope and Content Note {folded}

Folder 276 P -- MISCELLANEOUS (Pacific-Pendray) Physical Description: [35] Scope and Content Note {Pacific Electric Railway Co. [incl to/from GEH]; Pacific Geographic Society [Humphrey Read]; Pan American Scientific COngress [José J. Bravo]; Paris Observatory; Const. Parvule; J. Newton Parker; Sir Charles Parsons; Pasadena Association; Pasadena High School and Junior College [Ida E. Hawes]; Pasadena Vocation Bureau [Marion de Paar]; A. W. Pawlow; Fred Pearson; Peckham Bros.; George B. Pegram; Walter M. Pegram; Peking Central Observatory; G. Edward Pendray}

Folder 277 P, Q -- MISCELLANEOUS (Perez-Quarrie Physical Description: [54] Scope and Content Note {Felix M. Perez [Sanchez]; T. P. Perkins; Nicolas Perrakis; C. D. Perrine; Max Petersen; John E. Pfeiffer; Philadelphia Inquirer [John Miller]; "Pinacyanol" [advert from Lucius & Brüning Farbwerke]; Harry Hemley Plaskett; Poggendorff's Biographisch-Literarisches Handwörterbuch; Popular Astronomy; Popular Science Monthly [Sumner Blossom]; M. A. Porcabeuf; J. G. Porter; Potsdam Astrophysical Observatory [H. von Klüber; E. F. Trondlich]; Poulkovo Observatory; N. R. Powley; Poznan Observatory [Joseph Witkowski]; Irwin G. Priest; Henry S. [& Mrs.] Pritchett; S. Procopin; W. S. Prosser; Herbert Putnam; G. P. Putnam's Sons; W. F. Quarrie & Co. [S. E. Farquhar]}

Frederick Hanley Seares Papers: mssSeares papers 31 Finding Aid Correspondence Correspondence: N - Q

Box 14 Correspondence: R - Ros

Folder 278 Albert William RECHT 1932, 1934 Physical Description: [4]

Folder 279 L. A. REDMAN 1924-25, 1928-29 Physical Description: [49] Scope and Content Note {incl A. W. Redman. LAR was debunker of Einstein}

Folder 280 Georg REIMER, Verlagsbuchhandlung 1910, 1912, 1914-15 Physical Description: [17]

Folder 281 Martha RENNER 1910-11 Physical Description: [5]

Folder 282 Pieter Johannes van RHIJN 1912-16 Physical Description: [31]

Folder 283 Pieter Johannes van RHIJN 1917-20 Physical Description: [36]

Folder 284 Pieter Johannes van RHIJN 1921-23 Physical Description: [35]

Folder 285 Pieter Johannes van RHIJN 1924-26 Physical Description: [24]

Folder 286 Pieter Johannes van RHIJN 1927-30 Physical Description: [28]

Folder 287 Pieter Johannes van RHIJN 1931-35, 1938 Physical Description: [15] Scope and Content Note {1 ltr torn in 4 pieces}

Folder 288 RILEY-MOORE ENGRAVING CO. 1911-14 Physical Description: [28]

Folder 289 RILEY-MOORE ENGRAVING CO. 1915-16 Physical Description: [26]

Folder 290 Franklin Evans ROACH 1936, 1938 Physical Description: [11]

Folder 291 Frank Elmore ROSS 1926, 1928-29 Physical Description: [21]

Frederick Hanley Seares Papers: mssSeares papers 32 Finding Aid Correspondence Correspondence: R - Ros

Folder 292 Frank Elmore ROSS 1930 Physical Description: [28] Scope and Content Note {folded}

Folder 293 Frank Elmore ROSS 1931-32 Physical Description: [32]

Folder 294 Frank Elmore ROSS 1933 Physical Description: [58] Scope and Content Note {folded}

Folder 295 Frank Elmore ROSS 1934 Physical Description: [32]

Folder 296 Frank Elmore ROSS 1935 Physical Description: [38] Scope and Content Note {folded}

Folder 297 Frank Elmore ROSS 1936, 1938-40 Physical Description: [22]

Box 15 Correspondence: Row - Sha

Folder 298 Joseph C. ROWELL 1909-16 Physical Description: [37] Scope and Content Note {JCR was UCal-Berkeley Librarian}

Folder 299 ROYAL ASTRONOMICAL SOCIETY 1911, 1922-25, 1939 Physical Description: [12]

Folder 300 ROYAL PHOTOGRAPHIC SOCIETY OF GREAT BRITAIN 1911, 1914-15, 1924 Physical Description: [16]

Folder 301 Carl RUNGE 1924 Physical Description: [2]

Folder 302 Henry Norris RUSSELL 1921, 1924-28 Physical Description: [27]

Folder 303 Henry Norris RUSSELL 1929, 1931-32, 1934 Physical Description: [37] Scope and Content Note {incl ltrs FHS ?? Henrietta Young; c.ltr HNR ? O. Struve}

Folder 304 Henry Norris RUSSELL 1935-40 Physical Description: [24]

Frederick Hanley Seares Papers: mssSeares papers 33 Finding Aid Correspondence Correspondence: Row - Sha

Folder 305 R -- MISCELLANEOUS (Reese-Richey) Physical Description: [24] Scope and Content Note {Herbert Meredith Reese; F. P. Reilly; M. dos Reis; W. Reiter; Remeis Observatory, Bamberg; Rennselaer Polytechnic Institute Library; Republic Productions, Inc. [John T. Bourke]; D. J. Rhederg; E. W. Rice; Hugh S. Rice; C. R. Richards; Harold Richards; L. J. Richardson; R. G. D. Richardson; K. M. Richey}

Folder 306 R -- MISCELLANEOUS (Ridgway-Robertson) Scope and Content Note {John L. Ridgway; A. E. Riemer; T. K. Riggen; Philip S. Riggs; Augusto Righi; William E. Ritter; G. B. Rizzo; W. F. Roberts Co., Inc. [B. H. Roberts. folded]; H. P. Robertson}

Folder 307 R -- MISCELLANEOUS (Robinson-Ryves) Physical Description: [24] Scope and Content Note {Clara Robinson; Ruth Stone [Mrs. C. C.] Robinson; Rev. Luis Rodés, S.J.; Guy Rose; H. Rosenberg; Royal Institution, London; Royal Society of Edinburgh; Royal Society of London; Walter Russell; Ryerson Physical Laboratory; P. M. Ryves}

Folder 308 Charles Edward SAINT JOHN 1912-13, 1916, 1918, 1924, 1926, 1935-36 Physical Description: [22] Scope and Content Note {Some material concerns estate of St. John. Corresp: 1st Trust and Savings Bank of Pasadena, California; Frances L. St. John; Universum Book Export Co., Inc.}

Folder 309 R. A. SAMPSON 1917-18 Physical Description: [3]

Folder 310 Roscoe F. SANFORD 1916 Physical Description: [4]

Folder 311 George SARTON 1933 Physical Description: [22] Scope and Content Note {Re Sarton's lecture at CalTech}

Folder 312 Jan SCHILT 1926, 1934, 1941 Physical Description: [11]

Folder 313 Frank SCHLESINGER 1912-13, 1923-26, 1931, 1941 Physical Description: [20] Scope and Content Note {incl c.ltr FHS ? David White}

Folder 314 Karl SCHWARZSCHILD 1910-11, 1913-14 Physical Description: [12]

Folder 315 SCIENCE SERVICE 1928-30, 1934-35, 1937-38 Physical Description: [27]

Folder 316 SECURITY-FIRST NATIONAL BANK OF LOS ANGELES 1935-39 Physical Description: [12]

Frederick Hanley Seares Papers: mssSeares papers 34 Finding Aid Correspondence Correspondence: Row - Sha

Folder 317 SECURITY TRUST & SAVINGS BANK 1925-31, 1933-34 Physical Description: [35]

Folder 318 Thomas Jefferson Jackson SEE 1921, 1923, 1925 Physical Description: [7]

Folder 319 M. A. SEED DRY PLATE CO. 1910 Physical Description: [6]

Folder 320 Henry O. SEVERANCE 1910, 1915-17 Physical Description: [11]

Folder 321 Harlow SHAPLEY 1912-14, 1916 Physical Description: [29] Scope and Content Note {folded}

Folder 322 Harlow SHAPLEY 1921-24 Physical Description: [29]

Folder 323 Harlow SHAPLEY 1925-28, 1930 Physical Description: [30]

Folder 324 Harlow SHAPLEY 1931-35, 1937-39, 1944 Physical Description: [39] Scope and Content Note {incl tlgrm FHS ? F. F. Bunker; tlgrm WSA ? HS; c.ltr HS ? W. H. Christie; c.ltr HS ? Fritz Zwicky}

Box 16 Correspondence: She - S (Miscellaneous to Sch

Folder 325 M. Wanda SHELDON 1911 Physical Description: [10]

Folder 326 Willem de SITTER 1922, 1932-33 Physical Description: [5]

Folder 327 Bancroft W. SITTERLY 1930-31 Physical Description: [4]

Folder 328 Vesto Melvin SLIPHER 1919, 1928, 1930 Physical Description: [4]

Folder 329 Lois T. SLOCUM 1928-29 Physical Description: [13]

Folder 330 Henry SOTHERAN & Co., Booksellers 1909, 1912-18 Physical Description: [16]

Folder 331 Harold SPENCER-JONES 1924-25, 1928-31 Physical Description: [15]

Frederick Hanley Seares Papers: mssSeares papers 35 Finding Aid Correspondence Correspondence: She - S (Miscellaneous to Sch

Folder 332 Joel STEBBINS 1915, 1917, 1919-23, 1925-27, 1931-34 Physical Description: [30]

Folder 333 Joel STEBBINS 1936 Physical Description: [14] Scope and Content Note {incl ltr FHS ? A. E. Whitford. folded}

Folder 334 Joel STEBBINS 1937, 1939, 1941-43 Physical Description: [36] Scope and Content Note {incl 1 photo}

Folder 335 Harlan True STETSON 1919-20, 1924, 1928 Physical Description: [7]

Folder 336 O. M. STEWART 1910 Physical Description: [5]

Folder 337 Carl STÖRMER 1916-17 Physical Description: [8]

Folder 338 F. J. M. STRATTON 1920, 1928, 1932 Physical Description: [7]

Folder 339 Otto STRUVE 1927, 1932 Physical Description: [20]

Folder 340 Otto STRUVE 1933 Physical Description: [37]

Folder 341 Otto STRUVE Jan-June 1934 Physical Description: [30]

Folder 342 Otto STRUVE July-Dec 1934 Physical Description: [21]

Folder 343 Otto STRUVE Jan-May 1935 Physical Description: [30]

Folder 344 Otto STRUVE June-Dec 1935 Physical Description: [28]

Folder 345 Otto STRUVE Jan-May 1936 Physical Description: [32] Scope and Content Note {incl c.ltr OS ? John Strong; c.ltr OS ? Philip Fox; ltr Watson Davis ? OS; c.ltr OS ? W. Davis; c.ltr Leigh Page ? OS; ltr R. J. Kennedy ? FHS}

Folder 346 Otto STRUVE June-Dec 1936 Physical Description: [36] Scope and Content Note {incl c.ltr OS ? L. Page; c.ltr L. Page ? OS}

Frederick Hanley Seares Papers: mssSeares papers 36 Finding Aid Correspondence Correspondence: She - S (Miscellaneous to Sch

Folder 347 Otto STRUVE 1937 Physical Description: [34] Scope and Content Note {incl c.ltr OS ? C. J. Krieger}

Folder 348 Otto STRUVE 1938 Physical Description: [33] Scope and Content Note {incl c.ltr OS ? J. C. Duncan; c.ltr OS ? Rollin D. Hemens; c.ltr RDH ? OS; c.ltr OS ? P. W. Merrill; c.ltr OS ? Jahn & Ollier Engraving Co.}

Folder 349 Otto STRUVE 1939-40, 1942, 1944 Physical Description: [40] Scope and Content Note {incl c.ltr OS ? A. E. Whitford; c.ltr R. C. Tolman ? OS; c.ltr OS ? Donald P. Bean; c.ltr OS ? Mary Alexander; c.memo OS ? R. D. Hemens}

Folder 350 Glen Levin SWIGGETT 1916 Physical Description: [7] Scope and Content Note {re 2nd Pan American Scientific Congress}

Folder 351 S -- MISCELLANEOUS (Salto-Saunders) Physical Description: [20] Scope and Content Note {Salto Observatory; Sanborn, Vail & Co.; San Diego Business and Professional Women's Club; San Diego County Planning Commission; San Diego Scientific Library; E. Sanger-Sheppherd; W. W. Sargeant; A. P. Saunders; Frederick A. Saunders; George G. Saunders}

Folder 352 S -- MISCELLANEOUS (Scanlon-Schwassmann) Physical Description: [28] Scope and Content Note {Leo J. Scanlon; William C. Scarritt; Robert O. Schad; Paul W. Schenck; James A. B. Scherer; Frank H. Schleer; Carl Schleicher & Schüll; Hans W. Schneider; Dorothy E. Schoof; J. Schroeter; F. Schuerer; L. Schützenberger; A. Schwassmann}

Box 17 Correspondence: S (Miscellaneous from Sci) - V

Folder 353 S -- MISCELLANEOUS (Science-Sheffield) Physical Description: [31] Scope and Content Note {Science Press; Science Progress; Scientia; Scientific American; Scientific International Research Service Corp.; E. M. Scofield; Charles Scribner's Sons; N. P. Scudder; H. von Seeliger; Seismological Society of America; Selznick International Pictures, Inc. [W. E. McCune]; Service; Geneva Seybold; James A. Shanahan; W. N. Shaw; Barbara Sheffield}

Frederick Hanley Seares Papers: mssSeares papers 37 Finding Aid Correspondence Correspondence: S (Miscellaneous from Sci) - V

Folder 354 S -- MISCELLANEOUS (Sigma Xi-Slosson) Physical Description: [28] Scope and Content Note {Sigma Xi; L. Silberstein; Edward E. Simonds; Frederick Simpich; Arthur W. Sinclair; A. de Sitter; W. T. Skilling; Sarah Louise Slaughenhaup; Paul Slavenas; Frederick Slocum; E. E. Slosson}

Folder 355 S -- MISCELLANEOUS (Smart-Society) Physical Description: [30] Scope and Content Note {W. M. Smart; Albert M. Smith; Ruth Emily Smith; Sinclair Smith; Smith Premier Typewriter Co.; Smithsonian Institution; Edwin R. Snyder; Sociedad Astronómica de España y América; Società Astronomica Italiana; Société Astronomique de France; Société Francaise de Physique; Society of Writers to H. M. Signet}

Folder 356 S -- MISCELLANEOUS (Sofia-Steward) Physical Description: [25] Scope and Content Note {Sofia, University of; South Carolina, University of; Leland Stanford Junior University Library; Stanford University Press [Jessie Denton Whittern]; Staveley & Co.; William H. Steavenson; G. E. Stechert & Co.; Morton Stern; Elizabeth Ellen Sternberg [Mulders]; R. Sternberk; Steward Observatory}

Folder 357 S -- MISCELLANEOUS (Stoeckle-Synchronome) Physical Description: [27] Scope and Content Note {Clem Stoeckle; Julius F. Stone; P. W. Stoner; Clarence Strachauer; Samuel Wesley Stratton; George L. Streeter; Paul Stroobant; Georg Struve; Sunset Press; Sun Yatsen University Observatory; Swarthmore College Library; Eugene Swarzwald; Synchronome Co., Ltd}

Folder 358 Toshio TAKAMINE 1919, 1936, 1939 Physical Description: [10]

Folder 359 TOCH BROTHERS 1912 Physical Description: [8] Scope and Content Note {re photographic emulsions}

Folder 360 Robert Julius TRUMPLER 1921-22 Physical Description: [5]

Folder 361 Herbert Hall TURNER 1915, 1917, 1925 Physical Description: [9] Scope and Content Note {+ photo}

Frederick Hanley Seares Papers: mssSeares papers 38 Finding Aid Correspondence Correspondence: S (Miscellaneous from Sci) - V

Folder 362 T -- MISCELLANEOUS (Tait-Thorwarth) Physical Description: [27] Scope and Content Note {A. O. Tait; Tashkent Astronomical Observatory; A. Tass; Taylor and Francis; Taylor Instrument Cos.; Taylor, Taylor, & Hobson, Ltd.; Robert J. Teall; Jan Teders; B. G. Teubner; A. David Thackeray; O. Thomas; W. Irwin Thompson; --Thorndike; E. R. Thorwarth}

Folder 363 T -- MISCELLANEOUS (Tipton-Tuttle) Physical Description: [23] Scope and Content Note {E. H. Tipton; F. M. Tisdel; Richard C. Tolman; Treasury Department [C. W. Pendleton]; Triangle Photo Service [M. R. Rikon]; Karl J. Trübner; W. A. Trumbull; R. H. Tucker; Turkmenistan Observatory; Spencer D. Turner; Tuttle, Morehouse, and Taylor, Co.}

Folder 364 UNION DEUTSCHE VERLAGSGESSELSCHAFT 1910-11 Physical Description: [8]

Folder 365 UNIVERSITY OF CHICAGO PRESS 1919-20 Physical Description: [29]

Folder 366 UNIVERSITY OF CHICAGO PRESS 1921 Physical Description: [27]

Folder 367 UNIVERSITY OF CHICAGO PRESS 1922 Physical Description: [31]

Folder 368 UNIVERSITY OF CHICAGO PRESS 1923-24 Physical Description: [31]

Folder 369 UNIVERSITY OF CHICAGO PRESS 1925-26 Physical Description: [19]

Folder 370 UNIVERSITY OF CHICAGO PRESS 1927 Physical Description: [25]

Folder 371 UNIVERSITY OF CHICAGO PRESS 1928 Physical Description: [17]

Folder 372 UNIVERSITY OF CHICAGO PRESS 1929 Physical Description: [28]

Folder 373 UNIVERSITY OF CHICAGO PRESS 1930 Physical Description: [21]

Folder 374 UNIVERSITY OF CHICAGO PRESS 1931-33 Physical Description: [29]

Folder 375 UNIVERSITY OF CHICAGO PRESS 1934-36 Physical Description: [28] Scope and Content Note {Corresp: A. C. McFarland; Mary Irwin; Mary D. Alexander; M. W. Parkinson; A. W. Bishop}

Frederick Hanley Seares Papers: mssSeares papers 39 Finding Aid Correspondence Correspondence: S (Miscellaneous from Sci) - V

Folder 376 UNIVERSITY OF CHICAGO PRESS 1937-40 Physical Description: [38] Scope and Content Note {folded. Corresp: Mary D. Alexander; Rollin D. Hemens; J. E. McCune; D. S. Passmore}

Folder 377 U -- MISCELLANEOUS Physical Description: [33] Scope and Content Note {Ukrainian SSR Academy of Sciences; USSR Society of Cultural Relations with Foreign Countries [E. Tsubina; I. Korinetz; M. Apletin; E. Leite; M. Milikovsky]; US Civil Service Commission; US Coast and Geodetic Survey; US Customs Service; US Department of Commerce; US Geological Survey; US Naval Observatory; US Shipping Board; US Weather Bureau; Universal Film Manufacturing Co. [M. G. Jonas]; Université Libre de Bruxelles [R. Sedeyn]; University of California at Los Angeles [Frederick C. Leonard]; University of Utah [Junius J. Hayes]; University of Washington Library [W. E. Henry]; Universum Book Export Co., Inc.}

Folder 378 Alexander N. VYSSOTSKY 1935, 1940-41 Physical Description: [10]

Folder 379 V -- MISCELLANEOUS Physical Description: [27] Scope and Content Note {E. Valenta; George Van Biesbroeck; Marguerite Van Biesbroeck; H. C. Van Buskirk; Mabel Van Deusen; E. A. Varela; Ventura Abstract Co. [Charles Barnard]; A. Verschaffel; Vienna II Physical Institute [Georg Stetter]; Vitalait Laboratory, Inc. [Earle L. Ovington]; J. Voute. folded}

Box 18 Correspondence: W - Z

Folder 380 Herbert T. WADE 1910 Physical Description: [5]

Folder 381 R. James WALLACE 1909-10 Physical Description: [6]

Folder 382 WAVERLY PRESS 1915-18 Physical Description: [50]

Folder 383 WILLIAM WESLEY & SON 1909-13, 1921 Physical Description: [29]

Folder 384 Albert Edward WHITFORD 1935-36, 1939 Physical Description: [9]

Folder 385 Edwin Bidwell WILSON 1915 Physical Description: [19]

Folder 386 Edwin Bidwell WILSON 1916 Physical Description: [30]

Folder 387 Edwin Bidwell WILSON 1917-18 Physical Description: [26]

Frederick Hanley Seares Papers: mssSeares papers 40 Finding Aid Correspondence Correspondence: W - Z

Folder 388 Edwin Bidwell WILSON 1919-21 Physical Description: [36] Scope and Content Note {incl ltr. FHS ? Waverly Press; ltr h. Shapley ? EBW}

Folder 389 Edwin Bidwell WILSON 1922-25 Physical Description: [25]

Folder 390 Edwin Bidwell WILSON 1926-27, 1929, 1932-36 Physical Description: [32]

Folder 391 John L. WIRT 1914-16, 1922, 1926 Physical Description: [17] Scope and Content Note {incl tlgrm GEH ? JLW; c.2 ltrs H. Kayser ? GEH; c.2 ltrs JLW ? Agence de Libraire et de Publications; c.ltr A.L.P. ? JLW}

Folder 392 Max F. J. C. WOLF 1911, 1914, 1930-32 Physical Description: [8] Scope and Content Note {folded}

Folder 393 Robert Simpson WOODWARD 1910-11, 1913-16, 1920 Physical Description: [22]

Folder 394 WRATTEN AND WAINWRIGHT, LTD. 1910, 1912 Physical Description: [6] Scope and Content Note {Correp: C. E. K. Mees}

Folder 395 Frederick Eugene WRIGHT 1931, 1934-38 Physical Description: [29] Scope and Content Note {incl c.ltr FEW ? Edison Hoge; c.2 ltrs E.Hoge ? FEW}

Folder 396 William Hammond WRIGHT 1916, 1932, 1935-38 Physical Description: [16]

Folder 397 Charles Clayton WYLIE 1931, 1935 Physical Description: [7] Scope and Content Note {incl 1 ltr about James Van Allen}

Folder 398 Arthur Bambridge WYSE 1937 Physical Description: [17]

Frederick Hanley Seares Papers: mssSeares papers 41 Finding Aid Correspondence Correspondence: W - Z

Folder 399 W -- MISCELLANEOUS (Wadsworth-Washington) Physical Description: [29] Scope and Content Note {Edna Wadsworth; Heint Walentowsky; Gilbert T. Walker [folded]; O. R. Walkey; War Department [T. L. Coles; F. W. Coe]; J. G. Ward; Warner & Swasey Co.; Wasco County Library [Nina M. Moran]; Washburn College [Helen Whitaker]; Washburn Observatory [George C. Comstock]; Washington Academy of Sciences [Robert B. Sosman]; Washington, State College of [W. W. Foote]}

Folder 400 W -- MISCELLANEOUS (Watson-Wilder) Physical Description: [33] Scope and Content Note {Earnest Charles Watson; W. Marshall Watts; H. A. Weersma; Mrs. F. E. Weyerhauser; Mel Wharton; John Wheldon & Co.; Wheldon & Wesley, Ltd; Fred L. Whipple; James T. White & Co.; Gordon Whitnall; J. H. Whitney; Walter T. Whitney; "Who's Who" [A. N. Marquis; Europa Publications, Ltd.]; Gustave P. Wiksell; Marian Wilder}

Folder 401 W -- MISCELLANEOUS (Wildt-Williams) Physical Description: [28] Scope and Content Note {Rupert Wildt; Edmund Wilkes, Jr. [folded]; E. G. Williams; Henry Smith Williams; Kathleen Williams; W. Ewart Williams}

Folder 402 W -- MISCELLANEOUS (Willis-Worthington) Physical Description: [44] Scope and Content Note {C. Addison Willis; H. C. Willis; Carl Wilson; Herbert C. Wilson; H. W. Wilson Co.; Latimer J. Wilson; Olin C. Wilson; Ralph E. Wilson; Clyde Wolfe; Coral Wolfe; Harry O. Wood; R. W. Wood; R. v. d. R. Woolley; J. H. Worthington}

Folder 403 X, Y, Z -- MISCELLANEOUS Physical Description: [36] Scope and Content Note {X Club< [Stoughton Cooley]; Yale University Observatory; Yavapai County Chamber of Commerce; Robert M. Yerkes; Yerkes Observatory; Carl Zeiss Optical Works; Ernst Zinner; W. Zonn; Richard Seth Zug; Fritz Zwicky}

Manuscripts, notes, and notebooks

Box 19 Manuscripts: A - Ma

Folder 404 ABSORPTION CONSTANT OF WIRE GAUZE SCREEN. Approximately 1910 Folder 405 DISTANCE CORRECTION AND FOCUS. Approximately 1911 Folder 406 EFFECTIVE WAVE LENGTHS OF STANDARD MAGNITUDES; COLOR TEMPERATURE AND SPECTRAL TYPE -- Notes & calculations. Approximately 1943 Folder 407 THE FORM OF THE LUMINOSITY FUNCTION. Dec, 1923 Folder 408 HERSCHEL GAUGES -- Notes. Undated Scope and Content Note {Notes & comparisons of William and Sir John Herschel's star counts}

Folder 409 MAGNITUDES AND COLORS OF STARS NORTH OF +80?. 1941

Frederick Hanley Seares Papers: mssSeares papers 42 Finding Aid Manuscripts, notes, and notebooks Manuscripts: A - Ma

Folder 410 MAGNITUDES OF SOUTHERN COMPARISON STARS FOR EROS. Undated Scope and Content Note {Includes Notes on "Comparisons with Ross's Magnitudes," & "Comparison of Mount Wilson Pv with Harvard Visual Magnitudes"}

Box 20 Me - R

Folder 411 MEAN PARALLAXES AND THE LUMINOSITY FUNCTION. 1931 Folder 412 MEAN PARALLAXES OF STARS OF SMALL PROPER MOTION. 1924 Folder 413 MISCELLANEOUS COMPARISONS OF SCALES. Undated Folder 414 MISCELLANEOUS NOTES. Undated Scope and Content Note {includes notes on "Distribution of Stars in Quadrants," "Microscopes for New Measuring Machines," "Elliptical Polarization of Tower Mirrors," "Orientation of General Magnetic Field Plates," "Photographic Effects in Fath's Observations," & "Precision of Calcium Flocculi Measures"}

Folder 415 MOUNT WILSON CATALOGUE OF PHOTOGRAPHIC MAGNITUDES IN SELECTED AREAS 1-139 -- Early version. Approximately 1928 Folder 416 MOUNT WILSON CATALOGUE OF PHOTOGRAPHIC MAGNITUDES IN SELECTED AREAS 1-139 -- Final version. 1928. Folder 417 NEBULAE -- Notes. Approximately 1934. Scope and Content Note {Comparisons of measures by various Mt. Wilson astronomers on internal motions in spiral nebulae}

Folder 418 THE PHOTOGRAPHIC PROCESS. Undated Folder 419 REDUCTION OF THE HARVARD-GRONINGEN DURCHMUSTERUNG TO THE INTERNATIONAL SYSTEM OF MAGNITUDE AND COLOR. 1924 Scope and Content Note {includes notes on "Color Equation Metcalf Telescope --Comparison of Mt. Wilson Zero Point with that of Groningen-Harvard Durchmusterung (HA101)"}

Folder 420 REGRESSION LINES AND THE FUNCTIONAL RELATION -- Notes. Approximately 1944 Folder 421 RELATION BETWEEN COLOR INDEX AND EFFECTIVE WAVE LENGTH FROM THE OBSERVATIONS OF HERTZSPRUNG AND VANDERLINDEN -- Notes. Approximately 1944

Box 21 Manuscripts: S - Z; Notebooks; Photographs

Folder 422 SOME RELATIONS BETWEEN MAGNITUDE SCALES. 1924 Scope and Content Note {includes notes on "Color Equation and Scale Difference, Harvard Visual"}

Folder 423 SOME STRUCTURAL FEATURES OF THE GALACTIC SYSTEM. 1927 Folder 424 THE SUN'S MOTION AND THE MEAN PARALLAXES OF STARS OF DIFFERENT APPARENT MAGNITUDES. 1924 Folder 425 THE SURFACE BRIGHTNESS OF THE GALACTIC SYSTEM AS SEEN FROM A DISTANT EXTERNAL POINT AND A COMPARISON WITH SPIRAL NEBULAE -- Notes & calculations. Approximately 1920 Folder 426 SYSTEMATIC CORRECTIONS TO MAGNITUDES AND AN EXTENSION OF THE POLAR SEQUENCE -- Notes. Approximately 1932

Frederick Hanley Seares Papers: mssSeares papers 43 Finding Aid Manuscripts, notes, and notebooks Manuscripts: S - Z; Notebooks; Photographs

Folder 427 SYSTEMATIC DEVIATIONS FROM THE MEAN STELLAR DISTRIBUTION. 1926 Scope and Content Note Includes notes on "Stellar Distributions from Harvard-Groningen Durchmusterung".

NOTEBOOK: "Regions Suggested for Photographic Observations at 60 Inch Reflector," [by J. C. Kapteyn] NOTEBOOK: "Photometric Observations -- Laboratory" NOTEBOOK: "Photographic Investigations" Folder 428 Photographs Scope and Content Note 8 photos of celestial objects & Mt. Wilson.

Frederick Hanley Seares Papers: mssSeares papers 44 Finding Aid