Front:
200
The Great Telescope of the University of Chicago,
Yerkes Observatory, Williams Bay, Wisconsin.
The object-glass has a diameter of 40 inches. The tube is
63 feet long, and weighs six tons. The revolving dome is 90 feet
in diameter. The floor may be elevated through 23 feet
up to the balcony.
Back:
E. C. KROPP CO., MILWAUKEE
12110
STAMP HERE
