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Attaching cassegrain cage of the Hooker 100-inch telescope to crane in order to put onto the telescope tube. Mount Wilson Observatory. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Hoisting machinery Cassegrainian telescopes Reflecting telescopes Large astronomical telescopes Scientists Astronomical observatories Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc)