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___ --Heat is transmitted through theair by what is called convection, that is, the particlesof the air transmit it from one point to thenext.If a room is closed up tight, and a littleaperture provided so as to let in a streak of sunlight,it will give some idea of the unrest of theatmosphere.This may be exhibited by smokealong the line of the sun's rays, which indicatesthat the particles of air are constantly in motion,although there may be absolutely nothing in theroom to disturb it. terrail afreda Mon, 10 Sep 2012 5:13:29
