Merchant, F. W. (Francis Walter), 1855-1937, Fessenden, Cortez, b. 1852 · Toronto : Copp, Clark · leaf 251
necessity of providing ameans of ingress as well as egress to any confined spacein which the air is beino; vitiated. The air of dwellinghouses is vitiated by the respiration of those living inthem, and by the combustion of the oil or gas used forlighting. Means of removing the foul air and… … TRANSMISSION OF HEAT. 243 Fig. 189 shows a system of heating and ventilatingrooms in which a number of persons are required toremain for a considerable time. The air comes fromthe outside through the fresh air opening into thefresh air room, passes over the furnace, is heated, and
Physics
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