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 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.