Cros-section of the 40 inch Yerkes Telescope, 1915.
4 0 c m
 
37cm
actual image size: 29cm x 32cm

Cros-section of the 40 inch Yerkes Telescope, 1915.

Warner & Swasey Company

© Science Museum / Science & Society Picture Library

Description

Drawing in cros-section of the 40 inch refracting telescope with dome of the Yerkes Observatory at Williams Bay, Wisconsin in the United States. Built by the American company of Warner & Swasey Ltd with optics by Alvan Clark & Sons, the telescope was completed in 1897. This telescope was the primary instrument of the new observatory being established by the University of Chicago. The institution was established through the efforts of its first director, George Ellery Hale (1868-1938). He managed to convince Charles Tyson Yerkes (1837-1905), a Chicago railway tycoon, to fund the whole project. Today it is still the largest refracting telescope in the world.
 

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Image Ref.

10418884
 

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