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Francis Gladheim Pease Addenda: Finding Aid
mssPease addenda  
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This collection includes correspondence, manuscripts, printed material, and ephemera all related to Mount Wilson Solar Observatory astronomer Francis Gladheim Pease (1881-1938), his astronomy work, and the telescopes he designed (bulk dating from 1908-1937).
Francis Gladheim Pease was one of the original staff members of the Mount Wilson Solar Observatory when it was formed in 1904. His most important contribution to the Observatory was his expertise in the design and use of astronomical instruments. Together with George W. Ritchey, Pease designed most of the equipment for the new Observatory. His most significant work was in the design of the 100-inch Hooker Telescope, the 20-foot and 50-foot Interferometers, and the 200-inch Hale Telescope. In the field of astronomical observations, Pease is best remembered for his collaborations with Albert A. Michelson, the Nobel Laureate physicist at the University of Chicago. Together, they developed new experiments for determining the diameters of stars, the velocity of light, and the non-existence of the "ether."
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