Copper. 15th census of United States [1930]: Manufactures, 1929, industry series, copper, tin, and sheet-iron work, including galvanized-iron work, not elsewhere classified; electroplating; fire extinguishers, chemical; gas and electric fixtures, lamps, lanterns, and reflectors; stamped ware, enameled ware, and metal stamping, enameling, japanning, and lacquering.

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