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(41 - 60 of 125)
17″ shock tube vacuum pump
20″ far infrared telescope
Case being lowered over 200″ mirror
Ammoniating room of the 200″ telescope dome building
Plate holder for 200″ prime focus spectrograph (5 x 7 plates) with guider
Aluminizing of mirror at Palomar
Polishing 200″ mirror
Roy Jennkins awaiting the arrival of the generators
Byron Hill, superintendent at Palomar beginning in June 1936
48″ telescope drive
200″ aluminum tank cover, top view
Trucking the aluminizing chamber
17″ shock tube vacuum pump
200″ telsecope in the position it assumes when observing in the immediate vicinity of the Pole Star
200″ mirror back support
Knife-edge focusing device used in 200″ prime focus plate holder
Controls for 18″ Schmidt telescope, with clock drive
Polishing 48″ Schmidt plate
Palomar construction crew