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(161 - 180 of 2,715)
48″ Schmidt--pouring lower base moulding
Piano wire stright edge (close-up) showing electrical equipment used in reading contact
Time standard oscillators--panel end
Truck convoy nearing dome
Removing the rail grinder
R. W. Hummer
Robert Sinsheimer
No. 5 coude mirror mechanism, up position
Erecting fence around area
Radio telescope at Owens Valley (OVRO)
Earnest Watson
Excavation for JPL wind tunnel
200″ telescope--preparing east horn for placement
Guggenheim Jet Propulsion Center Lab
Dr. Mason and committee at work camp
Paul Ehrenfest
Insulating exterior aluminizing tank
Time standard room
Aeronautics faculty group
Garage at residence