Scope and Content: The Cheever collection contains correspondence, notes, manuscript material, diatom samples, and published plates pertaining to Cheever’s lifelong study of diatoms. There are also materials from Joseph Parker Wintringham, William B. Terry (regarding his father, William Almeron Terry), J.B. Wheeler, Edwin A. Schultze, and Adolf Wilhelm Ferdinand Schmidt.The bulk of Cheever's Diatom Herbarium consists of over 10,000 prepared slides, representing over two hundred genera and thousands...