Democratic Sentinel, Volume 19, Number 42, Rensselaer, Jasper County, 25 October 1895 — Three Forms of Chimneys. [ARTICLE]

Three Forms of Chimneys.

There are now three ferass of chimneys, according to Mr. W. H- Wakeman, In one form the top is smaller than the base of the flue; another ia larger at the top and the third is of uniform size throughout Which kind is best appears to be still an open question. Thoke who favor the first argue that it is the meet natural form, and that as the products of combustion cool and contract in ascending they need less space at the top. Advocates of the second admit that the gases contract on cooling, but reason that friction increases rapidly, making it advisable to enlarge the chimney to give increasing draught. Those who favor the third

aon* that the contraction of the gases counterbalances tbe friction ■ad that a flue of uniform six* if therefore correct.