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Ladd, Harry Stephen.
Harry Stephen Ladd papers, circa 1915-1982, undated.
These papers document Ladd's career with the USGS and his research on the geology of Pacific Islands. They include incoming and outgoing correspondence documenting field work, USGS matters, research and the publication of papers, and professional activities; diaries and field notes, mostly documenting his investigations in the Pacific; scrapbooks documenting personal and professional affairs, but which are particularly strong in documenting his role in the Crossroads Operation and Project Mohole; photographs, slides, and motion pictures, mostly from his field work in the Pacific; an oral history interview of Ladd conducted in 1977; and various manuscripts, notes, and lists from his research.
American geologist (1899-1982). Ph.D., geology (University of Iowa, 1925). The initial part of his professional career was spent in faculty positions at his alma mater and the University of Virginia, as a geologist with the Gulf Oil Company in Venezuela, and studying fossils under Edward Oscar Ulrich at the United States National Museum. Ladd began his career with the United States Department of the Interior in 1936 when he was appointed Geologist with the National Park Service. In 1940, he joined the United States Geological Survey (USGS) as a Geologist. He remained with the USGS until his retirement in 1969. Ladd was a Research Associate in the Department of Paleobiology, National Museum of Natural History, from 1969 until his death.
Ladd, Harry Stephen.
Geology.
Paleontology.
Photographs. aat
Portraits. aat
Scrapbooks. aat
Diaries lcgft
Field notes. aat ftamc
Geological Survey (U.S.)
Crossroads Operation.
Project Mohole
AIP-ICOS
Smithsonian Institution. Archives. Capital Gallery, Suite 3000, MRC 507, 600 Maryland Avenue SW, Washington, DC 20024-2520, USA
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