Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 291
FiQ. 309.—Convection currents inair about a heated flat-iron. in from all sides at the bottom. Make a box fitted with a glass frontand chimneys as shown in Fig. 310.Place a lighted candle under one of thechimneys, and replace the front. Lightsome touch paper * and hold it overthe other chimney. The… … Fig. 310.—Convection cur-rents in heated air. 319. Winds. While air-currents are modified by variousforces and agencies, they are, as we have seen (§ 124), all trace-able to the pressure differences wliich result from inequalitiesin the temperature and other conditions of the atmosphere. The…
Physics
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