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Of Pneumatics .

therefore, at the equator, where the sun shinesstrongly, there will be a continual wind fromthe east; but, on the north side, it will inclinea little to the north, and on the south-side, tothe south.

This general course of the wind about theequator, is changed in several places, andupon several accounts ; as, i. By exhalationsthat rife out of the earth at certain times, andfrom certain places ; in earthquakes, and fromvolcanos. 2. By the falling of great quanti-ties of rain, causing thereby a sudden conden-sation or contraction of the air. 3. By burn-ing sands, that often retain the solar heat to 3degree incredible to those who have not felt it,causing a more than ordinary rarefaction of theair contiguous to them. 4. By high moun-tains, which alter the direction of the windsin striking against them. 5. By the declina-tion of the fun towards the north or south,heating the air on the north or south side of theequator.

The œtm- To these and such like causes is owing, l. The/eons. irregularity and uncertainty of winds in climatesdistant from the equator, as in most parts ofEurope. 2. Those periodical winds, calledmonsoons , which in the Indian seas blow half 3year one way, and the other half another.3. Those winds which, on the coast of Guiney ,and on the western coasts of America , blow al-ways from west to east. 4. The sea-breezes,which, in hot countries, blow generally fromsea to land, in the day-time; and the land-breezes, which blow in the night; and, in short,all those storms, hurricanes, whirlwinds, andirregularities, ^which happen at different timesand places. . '