The Eigenmann mss., 1851-1971, consists of the papers of Carl H. Eigenmann, 1863-1927, ichthyologist, and his wife, Rosa Smith Eigenmann, 1858-1947, ichthyologist.
The Fleischmann mss., 1942-1950, consist of the correspondence between Herbert J. Fleischmann, a chemist connected with the General Hospital, Cincinnati, Ohio, and Albert Einstein, 1879-1955, theoretical physicist.
The Gest, Howard mss., ca. 1941-2011, consist of the correspondence, papers, reprints and copies of the work of Prof. Howard Gest, Distinguished Professor Emeritus of the Indiana University Department of Microbiology.
The Haeckel mss., 1879-1919, consists of letters and cards from biologist Ernst Heinrich Haeckel, 1834-1919, to anatomist Maximilian Carl Fürbringer, 1846-1920.
The Hickman mss., 1925-1962 consist of letters of patent and correspondence concerning the patents issued to Clarence Nichols Hickman, 1889-1981, physicist.