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 760
contracted, and could be broken away in about twelve hours withoutdanger to the retort. In order to take off this crust without endangering the retorts, an air-blast is used, as follows :—A cast-iron pipe, about three inches in diameter, is carried along the front of the benches, at a little…
Mechanical engineering
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