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.

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    or if two contrary Winds ftiou'd, at the fame l ime, blow towards the fame Place, the Air will be5 as it were, pil'd and heap'd up for fome Difiance on each Side, by their Meeting and Oppofition; and confequently there being in both thefe Cafes, more Air, its Gravity will be encreas’d. But if the Wind blows with any Degree of Strength, or Sfeadinels, over a plain Country, the Air, which before refted upon it, will be fwept along with it ; or if two contrary Winds fbou’d at the fame Time blow from off the fame Continent, the Air impendent over it, will be thereby greatly thirfd-and attenuated ; nor can the Spring of the Air bring in Supplies fail; enough to anfwer fuch a double Evacuation. So that in each of thefe Cafes, the Air, growing lefs in Quantity, will be confequently lighter : As, at the fame Time, the great Force and Swiftnefs of its horizontal Motion, will, it is reafonable to imagine, intercept and abate fome Part of its perpendicular Preimre. THUsalfo, as the Air is condenfable by Cold, when the Wind blows from the .Eafterly or . North-Eafterly Points, it will oi courfe bring from thofe frozen Climates, a great Quantity of their heavy and condens’d Air along with it: As on the other Side, the Air being dilatable by Heat (when the \¥ind blows from the Southerly Quarters,