This collection contains the extensive business, political, personal, and family papers of American geologist and petroleum
engineer Ralph Arnold (1875-1961).
Subjects represented in the collection include: mining, petroleum, and seismology in the Western United States as well as
Canada, Mexico, Cuba, South America, etc.; political papers from 1914-1956, mostly
concerning the campaign of Herbert Hoover for president; family and personal papers (1836-1961) of Arnold and his father,
Delos Arnold, containing source material on Pasadena and Southern California local history.
American geologist and petroleum engineer Ralph Arnold (1875-1961) was born in
Marshalltown, Iowa, on April 14, 1875. His father, Delos Arnold (1830-1909), was a lawyer and Iowa state
senator who became interested in the study of fossils after the discovery of crinoids
fossils in LeGrand, Iowa. The Arnolds moved to Pasadena, California, in 1886, and Ralph
attended both Pasadena High School and Throop Polytechnic School (now the California
Institute of Technology) before receiving a B.A. in geology and mining from Stanford in
1899. He continued at Stanford to complete an M.A. (1900) and Ph.D. (1902) in geology and
paleontology. In 1899, Arnold married Frankie Winninette Stokes. The couple had two
daughters, Winninette, who married chemist Richard M. Noyes, and Elizabeth (McKee).
Approximately 200,000 pieces in 257
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