Stress tests for Department of Commerce, Southern California, 1931

12 photographs of stress tests on airplane components for the Department of Commerce, Cycloplane Co., Southern California, 1931. "Subject: Stress tests for Dep[artmen]t of Commerce

193116206DW19310525162DW1931052516206Airplanes PartsCycloplane Co.Department of CommerceJohn Chantillon SonsSykes Geometric DevicesTrussesDickMeyres