Lower section of the 100-inch telescope tube, on a truck, with a crowd, at Mount Wilson Observatory. The tube and truck are parked next to the 100-inch telescope observatory building; an open door in the side of the building is seen behind the crowd and the tube. The crowd consists of men dressed in either suits or coveralls, and one woman wearing a hat, who is seated next to the driver of the truck. A small dog is seen at the far right, standing near the parked truck. Two trees are in the background, at the far right. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.