Lower portion of the 100-inch telescope mirror cell with lever system & plates for supporting the mirror, also showing piping for temperature control. Photograph taken inside the observatory dome; the foundation for the telescope is seen on the right-hand side and the interior walls of the dome are seen in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Electric apparatus and appliances Electric switchgear Electric controllers Mirrors Telescopes Reflecting telescopes Ladders Observatory domes Astronomical observatories Mount Wilson Observatory Photographic prints. (gmgpc)
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