Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 291
moke shows the direction ofthe air-currents above a fire. Hold ahot iron—say a flat-iron—in a cloudof floating dust or smoke particles(Fig. 309). The air is seen to risefrom the top of the iron, and to flowin from all sides at the bottom. Make a box fitted with a glass frontand chimneys as shown in… … 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 difierences which result from inequalitiesin the temperature and other conditions of the atmosphere. The…
Physics
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
