Construction of the new Mount Wilson Observatory office building, Pasadena. Excavation showing reinforcing columns and concrete shoot. The 60-inch telescope erecting house is in the background. A crane is also visible on the far side of the excavated foundation hole. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Construction--California--Pasadena Construction projects Concrete construction--Formwork Foundations--Design and construction Concrete footings Steel, Structural Steel framing (Building) Office buildings--Design and construction Photographic prints. (gmgpc)
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