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Fires improv'd: or, A new method of building chiminies, so as to prevent their smoaking ... / Made English and improved by J.T. Desaguliers. By whom is added, the manner of making coal-fires, etc.

  • Gauger, Nicolas, approximately 1680-1730
Date:
1736
Catalogue details

Licence: Public Domain Mark

Credit: Fires improv'd: or, A new method of building chiminies, so as to prevent their smoaking ... / Made English and improved by J.T. Desaguliers. By whom is added, the manner of making coal-fires, etc. Source: Wellcome Collection.

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    E x p e r 1 m. III. [ Fig. 6. ] The Fire being lighted, I have often held the Ball of my Thermometer at the Hole R, where the External Air comes in, and it never funk there, tho’ it often rofe; but if I open’d my Window, and held the Thermometer near it, the Liquor would fubfide confiderably. The Reafon of this appears to be, that the External Air was only cold by the Determination of its Parts; but the Air that came in at the Window, was colder by the Quality of its Parts ( for it froze then ) than by their Determination; fo that it muft then caufe the Thermometer to fubfide, and would have cooll’d the Room very much, if it had been let in then, as we have explain’d elfewhere. Experim. IV. [ Fig. 6.] r * Holding the Thermometer to the Hole R, when the External Air came into the Room, fo as to be lukewarm to the touch, and then holding it to the fame Hole, when the Air taken from within the Room comes out, fo as to feel very warm; I found the Liquor to rife no higher in this laft Cafe, than in the firft; becaufe the External Air felt only colder, upon ac¬ count
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