Front Page Titles (by Subject) Copper. - Money and the Mechanism of Exchange
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Copper. - William Stanley Jevons, Money and the Mechanism of Exchange 
Money and the Mechanism of Exchange (New York: D. Appleton and Co. 1876).
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This metal is in many respects well suited for coining. It does not suffer from exposure to dry air, possesses a fine distinct red colour, and takes a good impression from the dies, which impression it retains better than the majority of other metals. Accordingly, we find that it has been continually employed as currency, either alone or in subordination to gold and silver. The earliest Hebrew coins were composed chiefly of copper, and the metallic currency of Rome consisted of the impure copper, called aes, until B.C. 269, when silver was first coined. In later times copper has not only been generally used for coins of minor value, but, in Russia and in Sweden, a hundred years ago, it formed the principal mass of the currency. Its low value now stands in the way of its use. A penny, if made so as to contain metal equivalent to its nominal value, would weigh 870 grains, or more than an ounce and three-quarters troy. Its value is also subject to considerable fluctuations. Moreover, it is unlikely that copper in a pure state will be coined for the future, since bronze is now known to be so much more suitable for coinage.