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Francis Pease using the Michelson interferometer with the 100-inch telescope
James Olds
Robert Knapp
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
Shutter opening facing east discloses the telescope as it appears on its east side
Matthew L. Sands
James Bonner in academic attire
Caltech-Armed Forces meteorology training course
Jenijoy La Belle reading “On Campus” in her office in Dabney
Diffusion vac pumps for 200″ aluminizing system
Rail grinding assembly