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.
{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}
{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}
