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 660
d a turning square, as it is particularly useful for measuring the depth of boxesand other hollowed works turned in the lathe. In making straight mortises, as at s s, Fig. 1675, unless the groove is roughly formed, at the forge, orin the foundry, it is usual to drill holes nearly as large as the…
Mechanical engineering
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