Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 307
heated, which takes about IS or 16 hours, the flame ceases at the top, and all the openingsin the door and at the top are closed; still a few small crevices may be open which admit a little air.This causes the heat to become intense, and then the coke draws together, and forms a more close and… … Fig. 895.
Mechanical engineering
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