Front:
UNIVERSITY OF CHICAGO
THE 40-INCH TELESCOPE OF THE
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 DUME IS 90 FEET IN
DIAMETER. THE FLOOR MAY BE ELEVATED THROUGH 23 FRET UP TO
THE BALCONY.
15-WBWR
Back:
ORIGINAL CAMERA STUDY - REPRODUCTION RIGHTS RESERVED
C. R. CHILDS CO., 5707 LAKE ST., CHICAGO
TRADE
REG.
MARK
