Census, 1940 (16th). Manufactures. Manufactures, 1939: Industries, primary smelting and refining of nonferrous metals, alloying and rolling and drawing, alloying, and rolling and drawing of nonferrous metals, except aluminum, secondary smelting and refining of nonferrous metals and alloys, secondary smelting and refining, gold, silver, and platinum, secondary smelting and refining of nonferrous metals, not elsewhere classified.