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

  • Saul, Edward, 1677-1754
Date:
1735
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, and the causes of its different gravitation, are assign'd and explain'd. And a modest attempt from thence made towards a rational account and probable judgment of the weather / By Edward Saul. Source: Wellcome Collection.

    96/116 (page 92)
    C s» ] \ Coldnels of the polar Regions, whereby the Air above is to fuch a Degree condens'd and continu'd in a State of Denfity, as even to re lift the Impreffion of the Winds, and thereby prevent any notable Changes in its Gravitation. And agreeably to this Pur- pole, Mr. Boyle, from the Voyages to Green- land) &c, remarks ; that the Mountain^ of Ice in thofe Northern Climates, by the ex¬ traordinary Weight, or Refilxance of the Air retting upon them, give a certain and gradual Check to any fuch diftant Winds, as blow dire&ly upon them ; fo as either to becalm the Ships, or render their Ap¬ proaches very flow and leifurely towards them. But then, on the other fide, when any of thefe large Mountains, or Iflands of Ice, are loofen'd from their Foundations, and fail with the Current from the polar Regi¬ ons, towards the Tropic ; they are gene¬ rally follow'd with a ftrong North, or Eafl- erly Wind, driving them forward ; and as fome of thefe are deferib’d by Travellers, as nfing in Height, and finking in Depth, from 50 to 140 Fathoms, and extending in Bulk and Circumference feveral Miles : it is certain, that fuch a prodigious Accre- lion of Snow and Ice (advancing Fill with its broad Bafis out of the Ocean, in Propor¬ tion as the upper Parts melt and diflolve) nujft be attended with very great and fen- fible Efleds upon the Air and Vapours of warmer