60-inch dome under construction, Mount Wilson Observatory. Second main girder being hoisted into place. The structural framing in both the round building and the domed roof are clearly visible. Trees are in the surrounding area. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Observatory domes Astronomical observatories Steel framing (Building) Steel, Structural Round buildings Mount Wilson Observatory Construction--California Construction projects Building--California Trees Photographic prints. (gmgpc)
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