An account of the new invented Pennsylvanian fire-places: wherein their construction and manner of operation is particularly explained; their advantages above every other method of warming rooms demonstrated; and all objections that have been raised against the use of them, answered and obviated. With directions for putting them up, and for using them to the best advantage. And a copper-plate, in which the several parts of the machine are exactly laid down, from a scale of equal parts.


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