Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 47
le. I would therefore propose that thestandard pattern be made of aluminum and the core-boxof cast iron. Aluminum is just the metal that is wantedfor such small patterns, because it possesses the two nec-essary and important elements most desirable for pat-terns, strength and lightness in weight; a… … Fig. 26
Patternmaking
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