Twelve hundred entries from the golden age of cast metal — how bells are founded, why brass is not bronze, what a cupola melts and a core withstands — by Simpson Bolland, the trade's great teacher.

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Spring Pattern-lifter

A steel device for drawing very small patterns from the sand. Two fine stems connect with a spring which exerts its power in an outward direction, thus spreading the stems with force in the small hole made to receive it; after the manner of tweezers. See SPIKE.

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Spring Pattern-lifter

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