Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 295
iment is typical of the meansusually adopted to secure ventilation indwelling houses. A current is made toflow between supply pipes and vents byheating the air at one or more points inits circuit. A warm-air furnace system of heating ^^^ 3i8.-iiiustration ofprovides naturally for ventilation, if…
Physics
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