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Published online by Cambridge University Press: 27 October 2009
1 See Hammer, J. in Zeitschrift für Numismatik, Vol. XXVI, pp. 20, 21, for the proportion of gold in early electrum coins.Google Scholar
2 The exact proportions necessary for the required weight can be found by working out these equations, in which x = percentage of gold, y = percentage of silver: (a) x + y = 100. (b) .