Dispersion apparatus, in tent at Mount Wilson Observatory. Several other instruments are also present. The space housing these instruments appears to be constructed with several tarpaulins sewn together.
Interior of completed physical laboratory at Mount Wilson Observatory, with circular concrete table in use. Several various instruments are seen on the concrete tables: a camera on the right-hand side with an extended lens, a mirror near the...
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...
Mr. Wilson and Mr. Nichols standing with the 100-inch telescope Coude spectrograph, polar axis & slit assembly, Mount Wilson Observatory. Both men are wearing suits. Several astronomical instruments are seen throughout the room.
Interior of physical laboratory at Mount Wilson Observatory, with circular table in use. Numerous optical and astronomical instruments are seen in the lab, including a camera (right-hand side) and a mirror (center). Windows in the walls are seen.
Smithsonian spectrobolometer building at Mount Wilson Observatory. The wooden building is draped with a white tarpaulin, which provides shade over the windows. A wooden staircase leads to the slightly open door of the building. Some astronomical...
Interior of Smithsonian spectrobolometer building, Mount Wilson Observatory. Numerous instruments are in the room, on pedestals and tables. Small windows are seen in the walls; several pieces of dark fabric are hung throughout the area.
Spectrograph mounting for the National Academy of Sciences building in Washington, D.C. The spectrograph is in the center of the photograph, inside a room or laboratory. Behind the spectrograph is a wooden storage cabinet mounted on the wall. On...
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, and contains spectroscopic equipment, furnaces, magnets and a variety of other...
Scientists and equipment, set up at observation site for Mount Wilson Observatory solar eclipse expedition to Connecticut, 1925. Photograph taken by Edison Pettit. Some of the instruments appear to be mounted on wooden frames. The unidentified...
(Left to right): Roscoe Aanford (in electric suit) and Tom Nelson at the coude focus of the 100-inch telescope, Mount Wilson Observatory. Aanford stands to the right and just behind the seated Nelson. Aanford is wearing an electric suit, and Nelson...
Deane Peterson at the Sartorius iris photometer, Palomar Observatory. The photometer is placed on a wooden desk; several other instruments are seen behind Peterson in the room.
Snow telescope building from the southwest, with shelter rolled back, exposing coelostat, Mount Wilson Observatory. The stone columns seen in other images have been enclosed in wooden clapboard siding. Shrubs cover the hillside next to the building.
Snow telescope building as seen from straight ahead, Mount Wilson Observatory. Photo taken from spruce tree to the south, showing the 'pagoda' effect of the building. The coelostat is seen at the end of the platform. Trees and shrubs surround the...
Snow telescope building as seen from the physical laboratory, Mount Wilson Observatory. The shelter is rolled back, exposing coelostat. The roofs of the rolling shelter and the main building are visible. Trees and shrubs surround the observatory...
Snow telescope building as seen from the physical laboratory, Mount Wilson Observatory. The shelter is rolled back, exposing the coelostat. The clapboard siding and the roofs of both the rolling shelter and the main building are visible. Trees and...