Front:
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 6 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
350
