Mr. Porteous, who structed on correct principles, is to increase combustion by a tion, with durablity. It can be taken up forthe purpose of sends the drawing, is the maker of the articles mentioned as consumption of the gases which in ordinary fireplaces mostly laying water pipes, gas pipes, or… … 7 Big. 1 the top, as shown in both engravings, thus forming a deep space or chamber above and in rear.of the fire basket, in com bination with an inclined corrugated top, inclining upward from the back toward the front. Back of this recess or cham- ber is an air chamber, supplied with air by means…
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