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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    [ 71 ] above, have (as Mr. Boyle tells us) been ordinarily meafurM to the Height of one fourth, or one third Part of a Mile; and fome to half a Mile: But that very few, and thofe of the whiteft, and, in Appearance, the lofcieft Clouds, were, upon Tryal, found to be above three Quarters of a Mile in Height. But herein the Accounts of foreign Ma¬ thematicians widely differ: Not that the ordinary Floats of Clouds in France, or Italy, are, in reality, doubly or trebly higher than ours; but that flich remarkable Clouds, whole perpendicular Heights were accurately taken and committed to Writing, have fome of them, as they tell us, amounted to two, three, or even 4000 Geometrical Paces ; but none of them have exceeded 5000 Paces, or five Miles in Height. Tho* in all Ap¬ pearance, were Obfervations of this Kind more frequently made, the very lame Heights of the Clouds, or perhaps greater, might be fometimes dilcover’d even here. T h e Day after the great Storm when all was ftill and calm below, a Thun¬ der Cloud of unufual Height, andSwiftnefs of Motion, pals'd over Oxford, riling out of the fame Quarter, and moving in the fame Direction with the late Storm: Which was not indeed meafur’d by any that I remem¬ ber ; but was adjudg'd, by good Mathema¬ ticians upon Sight, to be at the leaft five Miles in Height. fOR)