by Bluegill » Wed Feb 29, 2012 8:25 am
The coinage act of 1792 specifically states that the dollar is 371.25 grains of fine silver. Which is .7734 Troy Oz. Which is how much silver is in the Morgan/Peace and earlier dollar coins. It also stated the weights of the half, quarter and dime. They were all proportional to each other.
The same coinage act also set the relative of gold to silver ratio at 15-1. It then set the value of the gold coins called Eagles at 10 "dollars". In other words the gold coin would be equal in value to 10 silver coins. 10 dollars contains 7.734 Troy Oz. of silver, a 15-1 ratio puts the amount of gold at .515 Troy Oz. which is how much gold is in the first release of the gold Eagle (1797-1804).
The debasement of our coinage started early on.
In 1838 the Eagle was debased to .48375 Troy Oz. That was the same year the dime, quarter and half were debased. That is why the dollar does not equal 2 halves, 4 quarters or 10 dimes, etc, etc...