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."
The Huntington Library does not require that researchers request permission to
quote from or publish images of this material, nor does it charge fees for such
activities. The responsibility for identifying the copyright holder, if there is
one, and obtaining necessary permissions rests with the researcher.
Open to qualified researchers by prior application through the Reader Services
Department. For more information, contact Reader Services.