Early construction of the 150-foot tower, Mount Wilson Observatory, as seen from the south. Several construction workers are on and underneath the wooden scaffolding. Trees are in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Towers--Design and construction Construction--California Scaffolding Construction workers--United States Construction equipment Tools Trees Mount Wilson Observatory Photographic prints. (gmgpc)
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