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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    [ ] calm and frill below. Sometimes we may difcover two diftind Squadrons of Clouds, floating at different Heights, in Streams of Air di redly contrary • fometimes an inter¬ mediate Wind aiding, by its fuperior Strength, controuls and carries each of the other Currents along with it • or if they hap¬ pen to be nearly equal, and neither of them . extinguiftfef, we may often, in fnch a Cafe, obferve the Clouds to* meet and mix, and to encreafe all of a hidden in Bulk and Quan¬ tity ; being driven and colleded together by fuch a Complication of Winds blowing towards the fame Regions of the Atim- Jpbere from different Quarters. And agree¬ ably to this Purpofe, in the very worft of Weather, when it runs into either Extreme of Rains* or Snow, it is reafonable to ima¬ gine that there is always the greateft Confu- fion in the Streams of Air, and Confluence of Clouds and Vapours above, when, by the Thiclcnds of the At molf here, we can dif- cern the leaft of it from below. Since therefore the Atmofphere is thus admaily feparable into various Horizontal Planes; and thofe (as it often happens) with different Streams of Air, and Squadrons of Clouds floating through them: From thence it will feemingly follow, not only, that the Weight and Temper of it muff be liable to frequent and fudden Alterations ; but that no regular, or certain judgment can be form'd of the general State and Quality of the