Cassegrain cage being attached to the Hooker 100-inch telescope telescope tube; workman is standing on Newtonian platform. Mount Wilson Observatory. Two men are visible in the photograph, as is the hook and cable used in attaching the cage. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Cassegrainian telescopes Reflecting telescopes Large astronomical telescopes Hoisting machinery Construction workers--United States Scientists Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc)
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