Partially constructed 100-inch telescope building, Mount Wilson Observatory. The main girder for the top of the domed frame is being hoisted in through the shutter opening. The steel stramework of the dome is visible, below that some of the metal sheathing is seen. The ground-level door is open. Trees surround the observatory building. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Observatory domes--Design and construction Construction--California Steel framing (Building) Steel, Structural Sheathing (Building Materials) Doorways Mount Wilson Observatory Astronomical observatories Observatories Trees Photographic prints. (gmgpc)
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