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United States Coins
Are convenient standards of weight. Those of gold are to be preferred, and when new will rarely be found to vary more than the tenth of a grain from the following weights:
Double eagle, $20, weighs.............
Eagle, " ...... “ $10, Half eagle, $5, Quarter eagle, $250," Three dollar, $3, One dollar, $1, " .......... .......... ............. 516 grs. 258 129 66 66 64" 77.4" 25.8"