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METAL WORK
IN discussing the artistic aspect of metal work, we have to take into account the physical properties and appropriate treatment of the following metals: the precious metals, gold and silver; copper, both pure and alloyed with other metals, especially tin and zinc in various proportions to form the many kinds of brass and bronze; lead, with a group of alloys of which pewter is typical; and iron, in the three forms of cast iron, wrought iron, and steel. All these have been made to serve the purpose of the artist, and the manipula-
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