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(3,041 - 3,060 of 3,177)
Testing crane, lifting 116,000 pounds
Model of 200″ telescope
John Pierce flying his glider
48″ Schmidt telescope polar axis into dome
Robert Bacher
Francis Pease using the Michelson interferometer with the 100-inch telescope
James Olds
Robert Knapp
Geology Division
Eric Temple Bell
Mirror preparation
Peter Kyropoulos
LA Aqueduct power house #1
Interior of 100″ Tank
Glass facets being mounted on grinding tool for 200″ mirror
Table in vertical position on 200″ grinding machine
Telescope south yoke member in place
Breakfast scene in the Grand Canyon, Carnegie Institution expedition
Physics group