汤玛斯爱迪生(Thomas Edison)正在展示他的电灯泡发明，亨利福特及法兰西丝杰尔(Francis Jehl)在一旁观看，1929年10月21日

出处: "Thomas Edison re-enacts his invention of the electric light bulb as Henry Ford and Francis Jehl look on, October 21, 1929." Photo courtesy of the Henry Ford Museum and Greenfield Village for "Henry Ford Museum and Greenfield Village," a Michigan Local Legacies project