General view of the rubber extruder in the Rubber Laboratory at the Naval Air Material Center. Chemist C.P. Yarnall (center) and two unidentified men are seen removing material from the extruder and coiling it around a large wheel for storage and transport.
Naval Air Engineering Center (U.S.), and U.S. Navy. “Rubber Laboratory at the Naval Air Material Center,” July 20, 1956. Photographs from the Papers of J. Hartley Bowen, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/kd17cs888.
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