Illinois Society of Architects · Chicago · leaf 216
Electric Pump AutomaticCellar Drainer Automatic ElectricPump, Switch and Tank … Automatic Sewerage and Seepage Ejector 216 bad or below which the ventilation may bereferred to as absolutely good. As a gen-eral proposition, it may be said, however,that a system of ventilation which permitsthe C02 to rise above 12 parts in 10,000 isnot a good modern ventilating system, wliileon…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
