Construction of the base of the observatory dome for the 60-inch telescope, Mount Wilson Observatory. Several unidentified construction workers are seen on and around the steel structural frame of the observatory building. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Construction--California Construction projects Construction equipment Steel framing (Building) Steel, Structural Construction workers--United States Scaffolding Mount Wilson Observatory Observatory domes Photographic prints. (gmgpc)
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