ion. ‘Two fur- The flames and heated air from this central furnace, the respective fire places for occasionally stopping the Hues, in order that the dense volume of smoke and com- naces are built side by side, the fires being divided hy therefore, drive into the mixing chamber, ¥ uustible vapor… … is fod in at W and falls upon the inclined grate, below ‘Thompson's furnace, so far as we can learn, is a which a strong fire of dry fuel is made, The heat and
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