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.

    13/60 (page 11)
    / l I* ] are fourteen inches each, or vvhofe area is 196 fquare inches, fufficiently anfvvers for fitting rooms or bed- chambers in general. The area of a chimney in a large kitchen, where the family is very numerous, fhould be at leafl 588 fquare inches, whether its form be a fquare or paral- lelogram. No injury can arife with regard to the afcent of the fmoke from this large capacity of the ihaft; whereas a too great contraction of it frequently produces very difagreeable effeCts, which are not eafily removed. Be- fides, the larger the capacity of a chimney is made, the feldomer will it want cleanfing. In applying the principles dated in the lad chapter, I fhall begin with buildings of the mod dmple con- druction, and afterward proceed to thofe which are more complicated. Let fig. 11, reprefent the plan of a cottage, having one chimney C, one door D, and two windows A B. Suppofe, fird, the door and windows to be air- tight, or fo clofely fi rcd, that they do not admit a quantity of external air fufficient to carry up the fmoke in the chimney. The houfe will, in that cafe, be incommoded with fmoke and dagnant air. If then a window or door be opened, the chimney obtains a Ripply of frefh air, and performs