. Canadian machinery and metalworking (January-June 1919). s car-bon dioxide (or, more familiarly perhaps,u CO, or carbonic acid gas); but eventhi-- ideal case the chimney gaseswould by no means consist of pure car-bon dioxide, because air is not pure oxy-gen. Four-fifths of its bulk, approxim-. consists of the practically inertitrogen, and hence, even with per-fect combustion and a pure carbon of the gas passing up thelimney is nitrogen, and only one-fifth,t most, is carbon dioxide. The nttrogenkcs no part in the combustion, exceptt by diluting the oxygen it checksthe chemica
. Canadian machinery and metalworking (January-June 1919). s car-bon dioxide (or, more familiarly perhaps,u CO, or carbonic acid gas); but eventhi-- ideal case the chimney gaseswould by no means consist of pure car-bon dioxide, because air is not pure oxy-gen. Four-fifths of its bulk, approxim-. consists of the practically inertitrogen, and hence, even with per-fect combustion and a pure carbon of the gas passing up thelimney is nitrogen, and only one-fifth,t most, is carbon dioxide. The nttrogenkcs no part in the combustion, exceptt by diluting the oxygen it checksthe chemical action and causes it toed far more slowly than it wouldthe nitrogen were practice the chimney gases containvarious other substances besides nitrogend carbon dioxide, because the fuel isburned under strictly ideal condi- PATENTATTORNEYS RESEARCH BUREAU REPORTS BY EXPERTS ON SCIENTIFIC, TECH-NICAL AND INDUSTRIAL RESEARCHES ARRANGED. PATENTS. TRADE MARKS. ETC. HANBURY a. budoenfi2 Drummono Montreal Cable Address BREVET. «&HX YOUR INVENT DN5 Send direct to Ottawa for free patentability re-port and booklet Patent Protection Clientspatents advertised in the Patent Review. Harold £I»ENErs CEWTRAL CHAM BE WS, OTTAWA, CANADA. PROMPTLY SECUREPl In all countries. Ask for our Investors Adviser,which wiil be sent free. MARION & MARION 364 University St. Merchants Bank Building, corner St. Catherine St., MONTREAL, Phone Up. 6474 and Washington. tions. If an excess of air is admittedto the furnace, a certain proportionof free and unused oxygen will pass upthe chimney, while if the air supply isdeficient the chimney will very likelydischarge more or less of the gas thatis known to the chemist as carbonmonoxide, and which burns with a paleblue lambent flame in household stoveswhen fresh coal has been recently thrownin. Moreover, coal is never pure addition to a certain variable propor-tion of entirely incombustible m
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