Lower section of the 100-inch telescope tube in transport on Mount Wilson. Photo taken on road below Pasadena gap. Photo taken by W. A. Hughes. Several unidentified men ride on the truck with the telescope tube; in front of the tube is another vehicle with several more unidentified men as passengers. Rocks and shrubs surround the mountain road. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.