Filming a recreation of Michelson's velocity of light experiments on Mount Wilson. An unidentified man, dressed in a suit and representing Michelson, sits underneath a dark tarpaulin. A wooden table and a stool hold several instruments, including a mirror. In the foreground at the far right, a white tarpaulin covers an unidentified object. Trees are in the background, behind the tent. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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