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Pattern Making as a Trade "Up to the year 1840, when the division of labor into trades begun, little was known of pattern-making as a distinct craft in this country. A person working at pattern-making at the present time should have a good knowledge of drafting, foundry work, the machinist's craft, and of woodworking tools in general, and, also, a good training in mathematics. Pattern-making to-day is considered one of the foremost of all the skilled mechanical trades. The pattern-maker must be able to read a drawing and also to picture in his mind what the finished casting will look like when the machinist has completed his work on it; he must also have knowledge as to how the casting is to be removed from the molding sand in the foundry, where it should be parted in the flask, and when the cores are needed, the shape and size of the cores, and how to construct the pattern so it will preserve its form and be durable." G. H. Willard
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