Illinois Society of Architects · Chicago · leaf 338
at the sides prevent birds fromnesting. The United States Government aftera rigid test selected the Pyramid Ven-tilator for the buildings at GreatLakes, Illinois. 700 NOW IN USE AT GREATLAKES. Copy of government test and labo-ratory test will be sent on application.Write for booklet. Our… … VENTILATING
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
