Note 3 — Chapter XIII · HEAT.

I was once consulted in regard to a smoking stove. It was an open Franklin stove, the pipe of which went through a fire-board into a monstrous chimney. I recommended that a pipe with a knee should extend from the pipe of the stove a little way up the chimney. The expedient was successful, because but a small body of air, that in the pipe, needed to be heated to establish an upward current.