The Aristotle mss., 1603-1704, consists of commentaries on the works of Aristotle. At least half of the volumes concentrate on logic, but other subjects are covered as well, including physics and general philosophy.
The Butler mss., 1835-1937, includes papers, 1877-1937, of Amos William Butler, 1860-1937, zoologist, anthropologist, and sociologist, and a few papers, 1835-1871, of his father, William Wallace Butler, 1810-1903, merchant and farmer.
The Cleland mss., 1911-1946, consists of the papers of botanist Ralph Erskine Cleland, 1892-1971. They consist chiefly of correspondence with prominent scientists on Oenothera, evening primrose.
The Cooper, K.W. mss., 1946-1959, consists of the correspondence of geneticists Kenneth W. Cooper and Hermann Joseph Muller. The topics covered include the mutual research of both relating to Drosophila, as well as research and teaching opportunities for respective colleagues.
The Cummins mss., 1888-1980 (Bulk 1930-1970), consists of the correspondence, personal papers, blueprints and drawings of Clessie Lyle Cummins, 1888-1968, automotive diesel engine developer and founder of Cummins Engine Company of Columbus, Indiana.
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.