http://213.198.0.180/penten.php?pagenumber=794
Take it most seriously!
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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