Observations on the ventilation of rooms; on the construction of chimneys; and on garden stoves / Principally collected [by R. Willan] from papers left by the late John Whitehurst.

  • John Whitehurst
Date:
1794
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the ventilation of rooms; on the construction of chimneys; and on garden stoves / Principally collected [by R. Willan] from papers left by the late John Whitehurst. Source: Wellcome Collection.

    14/60 (page 12)
    [ *2 ] * its office in carrying off the finoke properly. This circumftance points out to us a remedy for the defeCt, by making fome convenient aperture into the houfe; which however muff be done with caution: for if the opening is either at the door or window, the ftream of cold air flowing from thence will not only be un- pleafant, particularly in winter, but very injurious to the inhabitants. What I fhould propole for the pur- pofe, is an air-duSl, three or four feet long, to be fixed in either corner of the room moll remote from the fire, as at E ; and communicating with the external air through the wall. The diameter of the du6t muff be from five to fix inches. The air admitted by this means will afeend in a perpendicular direction to the ceiling; and being gradually diffufed, will foon acquire the temperature of the room. While this procefs goes on, no perfon within is fenfible of it, nor is the flame of a candle in the leaft diffurbed by it. At the fame time, fmoke and ftagnant air are effectually removed. If the air fhould be admitted near the fire, the chimney will aCt equally well, but the circulation through the room cannot be fo perfect; for as the frefh air muff take the neareft courfe to the chimney, it would leave that wffiich is contained in other parts of the room nearly quiefcent; whereby it would become lefs fit for refpi- ratiom