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 652
called 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…
Mechanical engineering · Mechanics · Engineering
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