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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    p. T H e unfetded Motion of the Mer¬ cury denotes uncertain and changeable Weather* 10. You are not fo ftricHy to obferve the Words engraven on the Plates (tho’ for the molt Part it will agree with them) as the Mercury's Riling and Falling : For if it ftands at much Rain, and then rifes up to Changeable, it prefages fair Weather ; al- tho’ not to continue fo long, as it wou'd have done, if the Mercury were higher: And fo on the contrary, if the Mercury flood at Fair, and falls to Changeable, it prefages foul Weather; tho' not fo much of it, as if it had funk down lower. Vide Harris's Lexicon, under Barometer, where Dr. Halley s Obfervations, with the Reafons of them, are alfo inferted. It wou'd be often of great Confequence to form a probable judgment feme few Hours before hand, of the enfuing State of the Weather; whether it may be likely to continue, or liable to a fudden Alteration : But altho' in fuch an Enquiry (by the pecu¬ liar Situation and Uncertainty of our Cli¬ mate) we can arrive at little more than bare Conjectures ; yet even here, a good Baro¬ meter will be of Service to us, in giving 11s fome little Light and Intimation. But then, in this Cafe, we muft confine our InfpeCtion wholly to the Surface of the Mer¬ cury