150-foot tower at Mount Wilson under construction, four sections up. Photo taken from 60-foot tower. Plate cracked. Construction equipment and debris visible, trees 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 Building sites Columns Building, Iron and steel Steel framing (Building) Mount Wilson Observatory Mount Wilson (Calif.) Trees Photographic prints. (gmgpc)
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