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Filming of a recreation of Michelson's velocity of light experiments, Mount Wilson. Seen at the far right are three unidentified filiming crew members, standing near a motion picture camera on a tripod. The man in the center is holding a large bag over his left shoulder, and several canteens over his right shoulder. In the distance, a tent, two unidentified actors and a fourth crew member are seen. One of the actors is dressed as Michelson in a suit, the other is wearing a military uniform. Trees are in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.