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Published as the Act directs, April 1, 1806, by Longman, Hurst, Rees & Orme, Paternoster Row.
6. Charcoal fires in pots are used chiefly in the shops of handicraftsmen. They warm a room (that is kept close, and has no chimney to carry off the warmed air) very speedily and uniformly; but there being no draught to change the air, the sulphurous fumes from the coals [be they ever so well kindled before they are brought in, there will be some] mix with it, render it disagreeable, hurtful to some constitutions, and sometimes, when the door is long kept shut, produce fatal consequences.
To avoid the several inconveniencies, and at the same time retain all the advantages of other fire-places, was contrived the Pensylvania fire-place, now to be described.
This machine consists of
A bottom-plate, (i) (See the [Plate] annexed.)
A back plate, (ii)
Two side plates, (iii iii)
Two middle plates, (iv iv) which, joined together, form a tight box, with winding passages in it for warming the air.
A front plate, (v)