The Mount Wilson Observatory Legal Papers comprise one box of material relating to the founding, construction, and operation of the institution dating from 1903 to 1939. The bulk of the papers are legal documents: deeds, leases, utility contracts,...
Aerial view of Mount Wilson observatory. Two towers are seen to the left of the 100-inch telescope dome, center of the photograph. Trees cover the landscape.
Telephoto view of Mount Wilson observatory as seen from Mount Harvard. The tall observatory tower is seen on the left-hand side of the ridge, with a smaller tower to its right, on the other side of the Snow telescope building. To the right, an...
Hooker 100- inch telescope side view with tube nearly vertical, dome shutter open. Mount Wilson Observatory. Photograph taken inside the observatory dome.
Interior of the dome, showing the Hooker 100-inch reflecting telescope, cassegrain observing platform, etc., as seen from the west. Mount Wilson Observatory.
100 inch telescope dome & surrounding landscape. Print bears Milton Humason's initials. Mount Wilson Observatory. Clouds are visible in the sky behind the observatory dome, and trees are visible in the surrounding area.
Construction of walls for a large water reservoir on Mount Wilson. Photograph taken from the 150-foot tower telescope; 60-inch telescope dome visible behind the construction. Trees are in the areas surrounding the reservoir walls and an...
Construction of 60-inch telescope building dome as seen from the north; hoisting up door at bottom of shutter opening. Mount Wilson Observatory. An unidentified man in a suit and hat stands on a curved steel roof section that is still on the...
Cassegrain cage being attached to the Hooker 100-inch telescope telescope tube; workman is standing on Newtonian platform. Mount Wilson Observatory. Two men are visible in the photograph, as is the hook and cable used in attaching the cage.
Gentle scrubbing of 100-inch mirror for the Hooker 100-inch reflecting telescope, after first deposit of silver on its surface. Mount Wilson Observatory. Four men, with long-handled brushes, are standing around the perimeter of the mirror.
Observatory dome of the 60-inch reflecting telescope, Mount Wilson Observatory. Photograph taken from the 60-foot observation tower. The San Gabriel Mountains are visible in the background.
The 100-inch telescope dome, Mount Wilson Observatory. Seen from the southwest, the shutters are open, and a man is visible on the exterior catwalk. photo taken with 11' lens. Trees are in the foreground.