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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    [ *6 ] But then, as thefe extraordinary Oppo- fitions of Winds, and Irregularities flowing from them, happen but feldom, and never laft very long; they will not hinder, but that the Rife and Fall of the Mercury, will, generally fpeaking, be an ufefui Monitor and ferviceable Diredtion to us, in other more regular, leifurely and fettled Altera¬ tions of the Weather. From what has been here faid in Addi¬ tion to the Theory of the Atmcfphere, it appears, that the Sun daily and actually raifes from the Surface of the Ocean, a .pro¬ digious Quantity of watry Bubbles and Ex¬ halations ; which the lower Regions of the Air> by their _Denfity receive, and tranf- mitting upwards, fuftain at their proper Height. Thefe the Winds, or Streams of Air, moving above, varioufly tumble and tofs about; fometimes fluttering and dif- perfing them in Regions far remote. And, at other Times, collecting and amaffing them together in greater Quantities than the Atmofphere can fupport. And if to thefe Premifes, we farther add, with the inge¬ nious and learned Mr. Derham, the Coldnefs of the fuperior Regions (condenfing and thickening the Coats of thefe watry Bubbles; and either freezing them above, or com¬ pacting them into folid Drops, and thereby encreafing their Weight, and giving them a Tendency towards falling) from thefe and the foregoing Principles, and the differ