Andrews, Ernest John, 1863-, Howland, Howard Newell, 1865- joint author · New York, London, The Macmillan company · leaf 162
dthese expenses, it has been foundbest, in some cases, to force the airthrough the fire by some suitable apparatus, such as a fanrun by an engine. In such cases there is, of course, little or no convection irM II II 1 II II iFiriTfi current involved. The value oflamp chimneys isin causing… … £3 £3 148 HEAT [§§ 249-251 shown in Fig. 69. The air at a is heated by the furnaceb ; cold air enters at cc and forces the hot air upward, asindicated by the arrows; the hot air passes into the roomto be heated, and there cools, and passes down again intothe heater. Sometimes the cool air is…
Physics
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