Removing bloom from newly deposited silver surface, by hand, with wads of cotton, on the mirror of the 100-inch Hooker reflecting telescope at Mount Wilson Observatory. The telscope is visble in much of the photograph; the mirror and scientists are below the telescope. Wooden ladders are visible on teh right-hand side. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Mirrors--Cleaning Reflecting telescopes Large astronomical telescopes Cassegrainian telescopes Scientists Cotton Ladders Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc)
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