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Rustic bridge, observatory and campus, Allegheny College, Meadville, PA
1906 Meadville, Pennsylvania, United States
The observatory at Bucknell University, Lewisberg, Pa., offers fine facilities for study and research in astronomy
1906 Lewisburg, Pennsylvania, United States
Cleveland Museum of Natural History
1906 Cleveland, Ohio, United States
The Franklin Institute Science Museum, Philadelphia, Pennsylvania
1906 Philadelphia, Pennsylvania, United States
Cambridge, Mass. Robinson Hall, Harvard College
1906 Cambridge, Massachusetts, United States
Harvard Union, Harvard College, Cambridge, Mass.
1906 Cambridge, Massachusetts, United States
Kirkwood Observatory, Indiana University, Bloomington, Indiana
1906 Bloomington, Indiana, United States
Searchlight on Mt. Lowe Observatory, Cal., and San Gabriel Valley
1906 California, United States
Night time scene of observatory and grave of Dr. Mitchell
1906 North Carolina, United States
Royal Observatory, Greenwich
1906 London, England
Palomar Observatory, Palomar Mountain, California
1906 California, United States
Palomar Observatory, San Diego County, California
1906 California, United States
Palomar Observatory, San Diego County, California--40
1906 California, United States
The 82-inch reflecting telescope of the W. J. McDonald Observatory of the University of Texas
1906 Fort Davis, Texas, United States
The tube of the 82-inch reflector of the W. J. McDonald Observatory of the University of Texas
1906 Fort Davis, Texas, United States
Greetings from McDonald Observatory, Davis Mountains
1906 Fort Davis, Texas, United States
Palomar Observatory, San Diego County, California
1906 California, United States
Palomar Observatory
1906 California, United States
Aerial view of one of the outstanding attractions of Southern California--Palomar Observatory on Palomar Mountain in San Diego County, California
1906 California, United States
The dome of Palomar Observatory's 200" telescope is shown here on the morning after a winter storm
1906 California, United States
A winter's storm leaves its blanket of white on the landscape surrounding Palomar Observatory's 200 inch Hale telescope
1906 California, United States
Palomar Observatory, Palomar Mountain, California
1906 California, United States
Interior view of Palomar Mountain Observatory, showing details of world's largest telescope
1906 California, United States
200-inch Hale telescope
1906 California, United States
The honeycombed structure of the 200" mirror sets waiting for the thin aluminum coating that will give it its high reflectivity
1906 California, United States
Seen from above after its old film of aluminum has been removed, Palomar Observatory's 200" Hale telescope mirror shows its internal honeycomb-like structure
1906 California, United States
With its new film of aluminum the 200" primary mirror of Palomar Observatory's 200" Hale telescope waits to be placed back into the telescope
1906 California, United States
Largest (200-inch) mirror in the world
1906 California, United States
The 200" telescope, Palomar Mountain, California
1906 California, United States
Palomar Mountain, California, 200" observatory - the observer is adjusting the photographic plate
1906 California, United States
Palomar Mountain, California, 200" observatory - assistant seated at control panel with the great mirror in the background
1906 California, United States
Palomar Mountain, California, 200" observatory - observer is seated at the Casse-grain focus ready to insert the photographic plate
1906 California, United States
Planetarium, Peninsula Nature and Science Center, Newport News, Virginia
1906 Virginia, United States
Observatory, Princeton University, Princeton, N.J.
1906 New Jersey, United States
Peking, observatory
1906 China
Smith's Observatory, Geneva, N.Y.
1906 Geneva, New York, United States
Smith Observatory and residence of Professor Brooks, Geneva, N.Y.
1906 Geneva, New York, United States
The observatory, Smith College, Northampton, Mass.
1906 Northampton, Massachusetts, United States
The 41 inch reflecting telescope
1906 Williams Bay, Wisconsin, United States
The University of Chicago Yerkes Observatory
1906 Williams Bay, Wisconsin, United States
The University of Chicago Yerkes Observatory
1906 Williams Bay, Wisconsin, United States
The Yerkes Observatory of the University of Chicago, William Bays, Wisconsin
1906 Williams Bay, Wisconsin, United States
Yerkes' Observatory, Lake Geneva, Wis.
1906 Williams Bay, Wisconsin, United States
The University of Chicago. Yerkes Observatory, Williams Bay, Wis.
1906 Williams Bay, Wisconsin, United States
The great nebula in Andromeda as photographed with the two-foot reflector, Yerkes Observatory, University of Chicago, Williams Bay, Wisconsin
1906
Brooks' Comet
1906
Mountain ranges on the moon
1906
The planet Saturn
1906
Sterling Building, 737 No. Michigan Ave., Chicago
1906 Chicago, Illinois, United States
Sky Ridge Observatory, 3201 Coaltown Rd., Moline, Ill.
1906 Moline, Illinois, United States
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