Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 90
ed from the outsides of the small pris-matic tubes by means of a thin scraperpassed between them. This apparatus is now one of themost extensively used in Paris, and givesthe greatest satisfaction. It is, however,open to the objection of obstructing pas-sage into the chimney-flue in a mannerwhich… … Vertical Section of Ventilating Fireplacewithout Plates. i
Fireplaces
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