Erection of metal columns for the wall of the 60-inch telescope building, Mount Wilson Observatory. Several unidentified construction workers stand in front of the steel support columns, below a system of ropes and pulleys. Behind them, on the right-hand side of the photograph, a concrete pillar and stairs is seen among wooden scaffolding and other construction. Trees are 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 equipment Construction workers--United States Steel framing (Building) Steel, Structural Foundations Scaffolding Staircases Stairs Mount Wilson Observatory Astronomical observatories Trees Mount Wilson (Calif.) Photographic prints. (gmgpc)
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