HOW SHOWERS FALL.
Warm air is capable of holding more moisture in suspension than ii cold air. When by any means a layei or current of warm air which is sat' urated with moisture is suddenlj Cooled, a portion of the vapour musl fall as rain. Cold shrinks the heated air as pressure does a wet sponge, and with precisely the same results In mountainous countries this cooling down of the warm and damp ail is most commonly produced by thi air being brought into the neighbourhood of the mountain tops which are cold. It is for this reason that in some countries the showers mostly originate among.the mountains, and comj through the valleys out upon th« plains. It will be understood easily that the higher the mountain the more striking will be the effects produced. If it be a snow-capped peak in a tropical region, a cloud will be formed, such as to conceal the summit all the time. This cloud will be constantly growing on the side of the mountain towards which the currents of warm and moist air are set, for on that side the air is being cooled down ; but after it has been driven over the peak it will waste away as rapidly, for it is then coming in contact with warmer air again. From such high peaks the cloud rarely breaks awa;/ as a shower. All the surplus moisture of the air is deposited in the form of rain or snow upon the peaks over which the air passes.
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King Country Chronicle, Volume V, Issue 372, 24 June 1911, Page 7
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255HOW SHOWERS FALL. King Country Chronicle, Volume V, Issue 372, 24 June 1911, Page 7
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