Interior of the Mount Wilson Observatory machine shop, Pasadena, from north end. A row of machines, with timing belts above them, runs through the center of the room. Cabinets and tools are seen along the walls. A row of windows runs the length of the far wall. In the back of the room a wooden ladder leads to a storage area suspended from the ceiling. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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