An essay concerning the effects of air on human bodies / By John Arbuthnot.

  • John Arbuthnot
Date:
1733
Catalogue details

Licence: Public Domain Mark

Credit: An essay concerning the effects of air on human bodies / By John Arbuthnot. Source: Wellcome Collection.

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    trary Currents of Air tending to the fame Place, muft accumulate the Air in that Place, and confequently raife che Mercury in the Barometer, -as a Wefter- ly Wind in the A¢/antick, and an Eafter- ly in the German Ocean: Two Currents of Ait from the fame Place, mut fink the Air in that Place, and confequently the Mercury in the Barometer: Thig is very poflible in Liquids, and happens even in the Motion of the Tides; if there was always a perfec Calm, the _ Aiquikbrium could only be charg’d by the greater or {maller Quantity of ponderous Contents; in confirmation of this Syftem it is found, where the Winds are not va- riable, as near the Line, the Alterations of the Barofcope are very {mall. . Thefe Alterations of the Gravity of the Air cannot proceed from its letting fall its ponderous Contents, as in great Showers. It 18 true, that a heavy Body falling thro’ a Fluid, during its Defcent, does not prefs upon it, but by the Refiftance which the Fluid gives to its Motion in Defcent; but the Decreafe of the Weight of the Snow, or Hail, is not proportional to this Caufe, nor can be accounted for from it. VI. The Air being fluid and heav b] Human