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 279
and sockets are cast, whether of uniform or irregular bore,see Fig. 812; c has two rectangular cores crossing each other at right angles; and / is the cap of adouble-acting pump, the core for which is shown in section by the white part of Fig. 822, the shadedportions being the metal; the great… … In addition to the cores used for making holes and mortises, much ingenious contrivance is displayedin the cores employed for other works of every-day occurrence, the undercut parts of which wculdretain them in the sand but for the employment of these and analogous contrivances. It will now…
Mechanical engineering
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