Yerkes Observatory Buildings, Instruments, Equipment, Grounds

Yerkes Observatory Buildings, Instruments, Equipment, Grounds
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Yerkes Observatory Buildings, Instruments, Equipment, Grounds
40-inch Refractor Telescope 26:417 (2008-003)
VI: Yerkes Observatory
Driving-clock of the Yerkes Observatory 40-inch refractor telescope.
Clocks | Refracting telescopes
Undated
Glass plate negatives; 24.8 x 14.4 cm
Alvan Clark & Sons; Warner & Swasey Company
373 West Geneva Street | Williams Bay, Wisconsin
Y01
Archival Photographic Files
University of Chicago Library, Special Collections Research Center
apf6-00326

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