Drawing of 60-foot observatory tower, east elevation, Mount Wilson Observatory. The title at the foot of the drawing reads: "East elevation of 60 foot tower, Solar Observatory, Mount Wilson". The drawing shows the above-ground height of the tower to be 81' 4", and the below-ground spectrograph pit to be 30' deep. Other components are also labeled. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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