Installation of reinforcing rods in the floor of the 100-inch telescope dome, Mount Wilson Observatory. Four (4) construction workers are installing the steel rods. Behind the workers, small piles of lumber are visible. 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.
Bars (Engineering) Construction projects Construction workers--United States Observatory domes Astronomical observatories Lumber Trees Mount Wilson Observatory Photographic prints. (gmgpc)
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