Front:
THE 40-INCH TELESCOPE
OF THE
UNIVERSITY OF CHICAGO
YERKES OBSERVATOORY, WILLIAMS BAy, WISCONSIN. THE OBJECT-
GLASS HAS A DIAMETER OF 40 INCHES. THE TUBE IS 6 3 FEET LONG
AND WEIGHS
SIX TONS.
REVOLVIN G DOME
IS 90
FEET
IN
DIAMETER. THE FLOOR MAY BE ELEVATED THROUGH 23 FEET UP TO
THE BAL CONY.
15-WBWR
1.
Back:
TRADE
MARK
REG
ALL REPRODUCTION RIGHTS RESERVED
