(a)
A silver coin of the United States containing 371.25 grains of silver and 41.25 grains of alloy, that is, having a total weight of 412.5 grains.
(b)
A gold coin of the United States containing 23.22 grains of gold and 2.58 grains of alloy, that is, having a total weight of 25.8 grains, nine-tenths fine. It is no longer coined. Note: Previous to 1837 the silver dollar had a larger amount of alloy, but only the same amount of silver as now, the total weight being 416 grains. The gold dollar as a distinct coin was first made in 1849. The eagles, half eagles, and quarter eagles coined before 1834 contained 24.75 grains of gold and 2.25 grains of alloy for each dollar.