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 458
dhering to the mould, and to form a porous envelope through which the gases, t&c, can slowlyescape. The moulds have numerous small crevices or holes for the purpose of letting the gases andsteam escape from the material when baked. The moulds when charged and closed tightly are heatedvery… … subside, when the contents of the moulds arecarefully taken out and placed upright in acrucible, which is filled with sand luted downand gradually raised to a white heat. Atthis high temperature they may be kept forsome time, to give them greater mechanicalhardness and strength; they are then…
Mechanical engineering
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