Front:
# 218
CUT-AWAY VIEW OF CHICAGO SUBWAY
WOPPLE
Back:
CUT-AWAY VIEW OF CHICAGO'S SUBWAY
IN THE CENTRAL BUSINESS DISTRICT
Shown are the main tubes; the downtown center
platform, which is 3500 feet long; the two-way
escalators to the mezzanines with store connec-
tions; and the State St. surface level. Features
of the subway are ventilation, illumination, esca-
lators, safety, comfort.
AC
CO .
PROBIC
