Construction of the 100-inch telescope foundation pier, Mount Wilson Observatory. The large brackets are being placed. The concrete structure is enclosed in wooden scaffolding. Several hoisting machines and cranes are in the site. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Foundations--Design and construction Concrete construction Construction--California Scaffolding Brackets Hoisting machinery Construction equipment Trees Mount Wilson Observatory Photographic prints. (gmgpc)
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