Construction and framing of a computer room addition at the base of the 150-foot tower telescope, Mount Wilson Observatory. Two unidentified construction workers, one on a ladder, are seen working within the building's frame. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Framing (Building) Steel Framing (Building) Buildings--California--Photographs Building construction--California--Mount Wilson Building sites--California--Mount Wilson--Photographs Buildings--California--Mount Wilson--Photographs Ladders Construction workers--United States Photographic prints. (gmgpc)
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