Correspondence, manuscripts, typescripts, galleys, notes, reprints, photographs, passports, awards, and other items; some materials are in Russian or German. Correspondents include Dr. L. Prandtl, Cyril O. Rhys, Gunhard Orovas, Elena Zagustin, and William F. Durand.. His typescript articles are largely on mechanical stresses and date from ca. 1907 to 1940, with some in Russian; there is also a typescript biographical essay on James Victor Uspensky, ca. 1947. Other items of note include a scrapbook (in Russian) with some photographs possibly from a trip to Russia in 1958; his report to Westinghouse on visits to European laboratories, 1934; and Esther Kaletzky's remarks at the First International Conference of Women Engineers and Scientists, June 1964. Additional papers added in 2009 pertain to the Timoshenko book collection in Stanford's Engineering Library but also include copies of Gregory Timoshenko's "Letters to My Grandchildren," 1983-90, which include information on his father, Stephen Timoshenko.

Stephen Prokofievitch Timoshenko, a world-renowned authority on theoretical and applied mechanics, was educated at the Munich Polytechnic Institute and at the University of Gottingen. He taught at the Polytechnic Institute of Kiev (1907-11) and the Polytechnic Institute of St. Petersburg (1912-17), before fleeing Russia for Yugoslavia. He taught at the University of Zagreb from 1920 to 1922, and then moved to the United States. He was a research engineer at Westinghouse and taught at the University of Michigan before joining the Stanford faculty in 1936. Although he officially retired in 1944 he continued to teach and write. His best known works include STRENGTH OF MATERIALS, THEORY OF ELASTICITY, and ENGINEERING MECHANICS.

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This collection is open for research.