After the adoption of the United States Constitution, the U.S. dollar was defined by the Coinage Act of 1792, which specified a "dollar" to be based in the Spanish milled dollar and of 371 grains and 4 sixteenths part of a grain of pure or 416 grains (27.0 g) of standard silver and an "eagle" to be 247 and 4 eighths of a grain or 270 grains (17 g) of gold (again depending on purity).[40] The choice of the value 371 grains arose from Alexander Hamilton's decision to base the new American unit on the average weight of a selection of worn Spanish dollars. Under the Articles of Confederation, each state had its own currency. There were actually NJ dollars, NY dollars, PA dollars, etc. The U.S. Constitution rectified this confusion and standardized all U.S. currency. Alexander Hamilton oversaw the creation of standardized U.S. currency in the late 1780s. He got the treasury to weigh a sample of Spanish dollars and the average weight came out to be 371 grains. A new Spanish dollar was usually about 377 grains in weight, and so the new U.S. dollar was at a slight discount in relation to the Spanish dollar. The design of U.S. currency reveals so much about U.S. history and government. For instance, on one side of the U.S. dollar there is an unfinished pyramid, and the Eye of Providence. The all-seeing eye over the unfinished pyramid is supposed to portray the United States as a land continuously growing and far from finished, although some believe it indicates a connection to the Illuminati secret society.