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University of Michigan physicist specializing in precision measurements of atomic physics; best known for working with positrons and positronium. Correspondence, grant proposals, course material, articles, clippings and photographs pertaining to Rich's research, teaching and administrative duties as a physics professor at the University of Michigan. Some materials relate to his colleague, William L. Williams.

The Arthur Rich Papers span the years 1962 to 1989, and document diverse aspects of his career as a professor of physics at the University of Michigan. The collection has been divided into seven series: Biographical Information, Research Activities, Course Materials, Correspondence, Publications, Topical Files, and Photographs.

Astronomer, professor of astronomy at the University of Chicago, later at the University of Michigan. Biographical material, correspondence, topical files, teaching materials, research files, and photographs relating to professional interests, including his interest in photoelectric photometry leading to the discovery of interstellar polarization; also files relating to various observatories.

The papers of William A. Hiltner cover his active role both in the Department of Astronomy at the University of Michigan and in the field of astronomy in general. The bulk of the collection consists of correspondence and topical files. Also included are some teaching and research materials and files relating to his professional associations.