Illinois Society of Architects · Chicago · leaf 538
one Wellington 2500 536 TELEPHONE MONROE 0577 =^Tjr»j W. W. WATSON CONTRACTOR FOR Plumbing, Gas Fitting and Drainage e*^lL^z 708 N. CARPENTER STREET, CHICAGO At Milwaul^ee Avenue The JOHNSONDUAL SYSTEM Each thermostat is capable of maintaining eitherof two temperatures; one a suitable… … Johnson DualThermostat Economy Automatic Temperature Regulation Since 1885MAIN OFFICE & FACTORY BRANCH OFFICES MILWAUKEE, WIS. IN ALL PRINCIPAL CITIES 537 Telephone Franklin 3720 WESTERN VENTILATINGand ENGINEERING CO. Supply and ExhaustVentilating Systems Shavings and Dust Collecting Systems…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-337-208.webp)
