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If it pafies over water, the weight of the furround- 
ing atmofphere forces up the water into the vacuity, 
part of which, by degrees joins with the whirling 
air, and adding weight, and receiving accelerated 
motion, recedes ftill farther from the centre, or axis, 
of the trump, as the prelTure leffcns, and at laft, as 
the trump widens, is broken into fmall particles, and 
fo united with air, as to be fupported by it, and be- 
come black clouds at the top of the trump. 
Thus thefe eddies may be whirlwinds at land, 
waterfpouts at fea, A body of water fo raifed may 
be fuddenly let fall, when the motion, &c. has not 
ftrength to fupport it, or the whirling arch is broken ^ 
fo as to let in the air ; falling in the fea, it is harmlefs, 
unlefs (hips happen under it. But if in the pro- 
grefljive motion of the whirl it has moved from the 
fea over the land, and there breaks, fudden, violent, 
and mifehievous torrents are the confequence. 
XXV. An 
