Seven (7) unidentified construction workers on the steel framing for the 100-inch telescope building, Mount Wilson Observatory. The area shown in the center of the photograph is the interior balcony. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Construction workers--United States Steel framing (Building) Steel, Structural Balconies Construction--California Observatories Astronomical observatories Mount Wilson Observatory Group portraits. (gmgpc) Portrait Photographs. (aat) Photographic prints. (gmgpc)
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