The core of the Robert A. Millikan Collection at the California Institute of Technology consists of the official papers generated by Millikan during the twenty-five years that he was the executive officer at the Institute. The bulk of the papers...

The papers of Wheeler J. North, Caltech alumnus (BS, biology, 1950; BS, electrical engineering, 1944) and Professor of Environmental Engineering, 1963-1992. The papers include correspondence and memos, data books, proposals and reports, and miscellaneous printed matter and media relating to...

A collection of films showing the construction and operation of the 200-inch Hale Telescope at Palomar Observatory, Palomar Mountain, California. This instrument was the world's largest effective telescope for 45 years (1948-1993). The collection includes footage of the transportation, grinding...

The scientific and personal correspondence, organizational and government files, NASA files including Apollo missions and lunar sample analysis, notebooks, biographical materials and audiovisual materials of Gerald J. Wasserburg (b. 1927) form the collection known as the Gerald J. Wasserburg Papers...