Original Mount Wilson Observatory office building, just after completion, Pasadena, California. The ground surrounding the building is still dirt. Two bicycles lean against the brickwork on one side of the building. Just behind the building,...
Mount Wilson Observatory's original office building (left) and new physical laboratory (right), Pasadena, California. Both buildings appear to be brick structures; windows and doorways are visible. Grass lawns, new plants, a sidewalk and street are...
Interior of Mount Wilson Observatory's Pasadena machine shop, from southwest corner. A central row of machines runs the length of the room, with their timing belts running vertically above them to others suspended from the ceiling. The exterior...
Mount Wilson Observatory's physical laboratory, in Pasadena, just after completion. This side view of the building shows a portion of the roof and three windows facing the camera. A sidewalk runs across the front of the building, with some areas of...
Wood shop in Mount Wilson Observatory's Pasadena physical laboratory. Several woodworking machines are seen in the room, in addition to wooden tools stored against the far brick wall. A doorway and windows are seen in the background. Timing belts...
Snow telescope spectroheliograph and speed changer in the machine shop, Mount Wilson Observatory. Behind the spectroheliograph is a wooden lift, with a ladder leading to it. On the white brick wall to the side is a clock.
Mount Wilson physical laboratory under construction, looking east from top of spruce tree south of Snow telescope. The partially-constructed brick walls are visible through the trees, with openings for windows prior to roof installation. In the...
Interior of Mount Wilson Observatory physical laboratory, under construction, as seen from the northwest window. The brick building is without a roof; some of the support pillars in the interior are visible. Wooden sawhorses and other construction...
Interior of Mount Wilson Observatory physical laboratory, under construction, view from the spectrometer pier. The interior walls and concrete bases are seen inside the lab.
Interior of Mount Wilson Observatory's machine shop, Pasadena, as seen from the north end of the room. Many machines and machine parts are visible in the room, some of which have pulleys suspended from the ceiling above them. The interior white...
Mount Wilson Observatory's physical laboratory and optical shop, Pasadena. This is a view of the exterior of the building; a long row of windows covered by cloth awnings is predominanly seen. A wooden ladder rests against the building at the far...
Government building under construction at Mount Wilson Observatory's Pasadena location. The brick exterior of the building is seen, with open spaces where windows will be placed. A group of unidentified construction workers can be seen standing on...
50-foot interferometer mount in front of Mount Wilson Observatory's machine shop, Pasadena. Three (3) unidentified mechanics are posed with the steel mount; two are standing on the ground next to the mount, and the third is seated above the mount....
50-foot interferometer mount in front of Mount Wilson Observatory's machine shop, Pasadena, with Pt. Loma eclipse cameras attached. The machine shop building is in the background, behind the steel mount.
Attaching the eclipse cameras onto the 50-foot interferometer mount at Mount Wilson Observatory's machine shop, Pasadena, for use at the 1923 Pt. Loma eclipse. Two (2) unidentified men are seen within the steel structure, attaching a camera to the...
50-foot interferometer mount, with cameras, in front of Mount Wilson Observatory's machine shop in Pasadena, for use at the 1923 Point Loma eclipse. The brick building is seen behind the interferometer mount.
Lower section of the 100-inch telescope tube, mounted on a truck outside of Mount Wilson Observatory's offices, Pasadena. Five (5) unidentified men and a dog pose on and in front of the tube on the truck. One of the men seated in the truck is...
Lower section of the 100-inch telescope tube, mounted on a truck, outside the Mount Wilson Observatory's Pasadena offices, side view. An unidentified construction worker poses behind the tube at the back of the truck. Behind the truck and tube an...
Interior of the west room of Mount Wilson Observatory's physical laboratory in Pasadena; taken from the southwest corner. This is possibly Arthur King's laboratory. Contained in the room are furnaces, spectroscopic equipment, magnets and a variety...