Construction of first floor of the new wing of Hale Observatories office building, Pasadena. Unidentified construction workers are seen throughout the construction area. A small portion of the office building is seen at the far left. 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 Construction workers--United States Concrete construction Brickwork Office buildings--California--Pasadena Trees Photographic prints. (gmgpc)
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