Installation of the observatory dome on the Hale Solar Laboratory, Pasadena. The dome is on wooden ramps for hoisting onto the roof of the Laboratory building, seen in the background. Two unidentified construction workers stand on either side of the dome on the ramp. A tree stands at the far left side of the Laboratory building. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Observatory domes Hale Solar Laboratory Laboratories Roofs Ramps (Walkways) Hoisting machinery Construction workers--United States Trees Photographic prints. (gmgpc)
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