Fan Propeller Small 320×91 Medium 640×182 Large 1024×292 Download Tiff Original 2400×684 | (227.9 KB) Description A machine using an electric motor to rotate thin, rigid vanes in order to move air, as for cooling. Keywords artefact, artifact, device, fan, instrumentality Galleries Appliances Source: Government Printing Office Official Gazette (Washingon, DC: Government Printing Office, 1912)
