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Central section of steel horseshoe bearing for Hale Telescope mount open during construction at South Philadelphia Works
Ceremony to recognize completion of framework tube assembly for Hale Telescope at South Philadelphia Works
Celluloid model of horshoe mount for Hale Telescope in setup for strain tests
Schematic drawing for Hale Telescope yoke mount
Declination bearing during construction for Hale Telescope
Celluloid model of horshoe mount for Hale Telescope in setup for strain tests
Cutaway drawing showing declination trunnion for Hale Telescope
200-inch mirror for Hale Telescope
Celluloid model of horseshoe mount for Hale Telescope
Detail of steelwork for Hale Telescope
Sketch of construction near prime focus inside dome for Hale Telescope
Celluloid model sections of horseshoe mount for Hale Telescope
Employee measuring I-beam for Hale Telescope at South Philadelphia Works
Aluminizing chamber inside Mount Wilson Observatory
Schematic showing rollers and other components of Hale Telescope
Revolving cage and tube framework for Hale Telescope under construction
Drawing of a person at control panel looking up at Hale Telescope inside dome
Men working from inside section of steel horseshoe bearing for Hale Telescope mount at South Philadelphia Works
Men posing with revolving cage for Hale Telescope loaded on rail car
Labelled schematic drawing for Hale Telescope structure
Schematic design drawing of Hale Telescope with dome
Revolving cage for Hale Telescope leaving South Philadelphia Works building on rail car
Constructing scale celluloid model of Hale Telescope
Schematic for parts of steel framework for Hale Telescope
Mount Palomar site for Hale Telescope

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