Installation of the top section of main girder of 100-inch telescope dome being hoisted through shutter opening; view from inside dome structure, Mount Wilson Observatory. Three (3) construction workers are posed on and around the girder. The structural beams of the observatory dome are visible, as is a portion of the circular platform. Trees are visible in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Girders Plate girders Plates, Iron and steel Building, Iron and steel Construction workers--United States Mount Wilson Observatory Observatory domes Group portraits Portrait photographs Photographic prints. (gmgpc) Group portraits. (gmgpc) Portrait Photographs. (aat)
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