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National Geographic : 1904 Mar
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THE PHILIPPINE ISLANDS AND THEIR PEOPLE pines on their westward course and turn north in the China Sea. Their origin is probably in the region where the trade wind, blowing con stantly from the eastward, meets the southwest monsoon. It maybebycon flict between these two opposing air cur rents in this region that the whirl is set ter, and violence the so-called West India hurricanes. They are of frequent occurrence, often following one another closely, at intervals of but a few days, and many of them have been very vio lent and destructive. The rainfall of the archipelago closely follows the winds. The general modus Nipa House Under Construction up. At first this whirl travels in the course of the trades, as they are the dominant wind, but as it goes westward the influence of the monsoon becomes relatively the stronger, and the typhoon yields to it and passes off in its direction to the northeast. Hence the monsoon season is the season of typhoons. Typhoons resemble in course, charac- Photo by Gannett operaldi of rain-making is very simple and scarcely needs repetition here. Air coming off the sea is always and every where practically saturated with moist ure. On reaching the land, if the latter is colder than the sea, and therefore colder than the air currents, which have the temperature of the sea, it is chilled, and hence, unable to hold in solution so rOI
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