The Motion of Fluids, Natural and Artificial: In Particular that of the Air and Water ...

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A. Ward, 1737 - 375 pages
 

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Page 35 - ... that 850 gallons of air, near the earth, weigh as much as one gallon of water. Now, according to the nature of all other fluid bodies, the air presses the surface of all things exposed to it every way equally. When, therefore, the legs of the syphon, equal in length, are turned down, the weight of the atmosphere above being kept off by the machine, the under air, bearing against and repressing the water which tends to fall out of both of them with equal force, keeps it in suspense, and prevents...
Page 365 - Newtorc, to be from the concurrence of two Tides ; the one propagated in fix Hours out of the great South-Sea along the Coaft of China ; the other out of the Indian-Sea, from between the Iflands in twelve Hour?, along the Coaft of Malacca and Cambodia.
Page 163 - These are esteemed the best of any general rules hitherto made : 1. The rising of the mercury presages, in general, fair weather; and its falling, foul weather, as rain, snow, high winds, and storms. 2. In very hot weather, the falling of the mercury indicates thunder.
Page 365 - Tides, being produced in North- Latitude, is, as has been faid, greater, when the Moon being to the North of the Equator is above the Earth, and lefs when fhe is under the Earth. The other of them, which is propagated from the...
Page 164 - ... for two or three days before the foul weather is quite over, then expect a continuance of fair weather to follow. 6. In fair weather, when the mercury falls much and low, and thus continues for two or three days before the rain comes, then expect a great deal of wet, and probably high winds. 7. The unsettled motion of the mercury denotes uncertain and changeable weather.
Page 252 - India, &c. which become hotter, and reflect more heat than the seas beyond the equator, which the snn has left; the winds, therefore, instead of blowing from thence to the parts under the equator, blow the contrary way ; and, when the sun leaves those countries, and draws near the other tropic, the. winds turn about, and blow on the opposite point of the compass.
Page 60 - These ought, in like manner, to be air-tight, and so disposed, as to let the water freely rise, but absolutely to hinder its return. When the forcer is first moved upwards in the barrel, the air between that and the water below, having room to dilate, by its natural spring, will of course be rarefied ; the pressure of the atmosphe're being intercepted by the force of the barrel AB, on one hand, and by the upper valve at S in the branching-pipe, on the other, the water will rise from the spring into...
Page 163 - But in a continued frort. it the mercury rifes, it will certainly fnow. 4. When foul weather happens foon after the falling of the mercury, expect but little of it ; and, on the contrary, expect but little fair weather, when it proves fair lliortly after the mercury has rifen.
Page 164 - Order to pafs a right Judgment of what Weather is to be expected, we ought to know, whether the Mercury is actually Ri/tng or Falling, to which End, the following Rules are of Ufe.
Page 361 - Pofition, and that it would be always high Water under the Poles, and low Water every where under the Equinoctial :. and therefore the nearer the Moon approaches the Poles, the lefs...

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