Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 198
bricks to a temperature little short of that in the furnace itself, pass successively over coolerand cooler surfaces, and escape at length to the chimney-flue nearly cold. After heating these twochambers for a certain length of time, the direction of the draught is reversed. The current offlame or… … contact with the brickwork, are heated as they ascend, until at the top they attain a temperaturenearly equal to the initial heat of the waste gases. Passing up into the furnace, the gas and airmeet, and, thus heated, they at once ignite, producing an intensely hot flame. The flame after…
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