Surfacing the rails of the dome for the Hooker telescope, Mount Wilson Observatory. Along the rail is a motor-driven grinder, pushed along by a motor-driven truck, and guided by a steel boom pivoted in the center. The San Gabriel Mountains are visible in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Observatory domes--Design and construction Mount Wilson Observatory Astronomical observatories Grinding and polishing Machinery Trees Photographic prints. (gmgpc)
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