Construction of a foundational Pier and stairs to the constant temperature room for the 60-inch telescope building, Mount Wilson Observatory. An unidentified construction worker stands among the wooden scaffolding near the stairs. The concrete foundational pier is seen behind him, to his left. Other wooden forms and scaffolding are in the area; 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.
Construction--California Construction projects Construction workers--United States Foundations Staircases Stairs Scaffolding Lumber Observatory domes Mount Wilson Observatory Photographic prints. (gmgpc)
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