Illinois Society of Architects · Chicago · leaf 455
Bulletin No. 31 for meth-ods and results of tests on house heatingapparatus. These tests have been made ondifferent kinds of house heating apparatuswith different kinds of fuel. The bulletinembodies the results of about three hundredtests. These bulletins are for free distribu-tion. VENTILATION.… … Lon^back and forth&retravel holds hot gases in con-tact with heating sur&ces-^
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
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