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Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools (1916)

Griffith, Ira Samuel, 1874-1924 · Peoria, Ill., Manual Arts Press · leaf 333

An illustration from Woodwork for secondary schools; a text-book for high schools and colleges, prevocational and elementary industrial schools, 1916, leaf 333 — sand wdiile thepattern is being drawn. Such machines are used onlywhen large numbers of castings are wan.ted requiring ac-curacy, Fig. 516. 273. Double Shrinkage.—Machines, such as that justmentioned, have metal patterns.Metal patterns are also com-monly used without machineswhere permanency is… … Fig. 517. Match Plate.

Woodwork (Manual training)

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