, and as it passes on through art have been of the simplest nature—only the ap- owing to perfect combustion of the gases, and free- plication ot heat in a common kiln or oven. Al- warmer, at last glowing ware, it will result that the dom from injury to the goods by sudden changes of kiln fires are… … HOFFMAN’S ANNULAR OVEN. Tt is equally well adapted to roasting ores, burning kiln has not heretofore been attutred. Much time, Size is bucning and wheo its contents have reached the desired temperature, No. 8 will have arrived at Hime, cement, and bricks, tiles, elec. More than two fuel, and heat…
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