Coupled-gear truck & horse teams on bend of Mt. Wilson toll road above Martin's camp water tunnel; they are carrying sections of the 60-foot tower telescope. Dowd & George Willis Ritchey are pictured. photo taken at 5:35 pm. Rocks, shrubs and trees are visible along the mountain road. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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