An historical and philosophical account of the barometer, or, weather-glass, wherein the reason and use of that instrument, the theory of the atmosphere, the causes of its different gravitation are assigned and explained. And a modest attempt from thence made towards a rational account and probable judgment of the weather / By Edward Saul, A.M.

  • Saul, Edward, 1677-1754
Date:
1766
Catalogue details

Licence: Public Domain Mark

Credit: An historical and philosophical account of the barometer, or, weather-glass, wherein the reason and use of that instrument, the theory of the atmosphere, the causes of its different gravitation are assigned and explained. And a modest attempt from thence made towards a rational account and probable judgment of the weather / By Edward Saul, A.M. Source: Wellcome Collection.

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    [ ] Appearance near the South Pole; which feems to be one of the Wonders, or Myfte- ries of Nature, lying without the Reach of human Imagination to form any rational, or even probable Conjecture about it) and return back to what bears a more immediate Rel ation to this Subject. 2. The Atmofphere being (as we have remarked above) of fo great Depth and Extent, and reding with its wTole incum¬ bent Weight upon the Surface of the Earth, the general PreiTure refulting from it, mull be great in Proportion. Let us fuppofe a cubical 'Foot of Water, taking it at the lowed, to weigh 63 (though fome of our Englijh Authors have rated it at 76) Pounds $ and that the Weight of the Adry as is evi¬ dent in a Pump, ordinarily fupports a Co¬ lumn of Water 33 Feet in Height. From thence it will follow, that the general Pref- fure of the Atmofphere, is equal to that of an Ocean of Water furrounding; the Globe 33 Feet in Depth. And, confequently, that the Atmofphere impendent over England (computing it in iuperficial Meafure to be 39 Millions of Acres) amounts to more than Fifteen Hundred Thoufand Millions of Tuns Weight, viz. 1,576,735,875,000 Tuns. A n d iince it is the Property of al! Fluids, to raife and buoy up, all fuch Bo¬ dies, which, Bulk for Bulk, are lighter than ihemfelves, lighter than the Medium in which