Correspondence, 1945-1961 while R. Rollefson was chairman (7/26/2); subject files including course lists and course committee material, experiments, Ingersoll Memorial Fund, Sterling Hall Bombing, photographs, publication lists, visitors, and expenditures, 1946-49; fiscal record books relating to apparatus and supplies, research and special funds, 1885-1947, 1952-1962; one folder and five cassette tapes (numbered 1-6 with #3 missing) of a Nuclear Physics Department Symposium, held in May 1989 and including a speech by Raymond Herb, addresses by Hugh Richards, Gregory Breitt, and others which relate to the department's history (7/26/4: 1-3); minute books, 4 volumes, 1914-1917, 1942-1954 (7/26/1); also a photo album of Japanese schools (7/26/1); and log of speakers and topics at weekly colloquia, 1914-1946 (7/26/9).