Gentle scrubbing of 100-inch mirror for the Hooker 100-inch reflecting telescope, after first deposit of silver on its surface. Mount Wilson Observatory. Four men, with long-handled brushes, are standing around the perimeter of the mirror. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Mirrors--Cleaning Silver Reflecting telescopes Brooms and brushes Large astronomical telescopes Astronomical instruments Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc)
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