Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 752
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 · Mechanics · Engineering
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