Website For Performing Historical U.S. Dollar Value Comparisons

I have discovered a great website entitled "Economic History Services" that allows one to see just how much the value of the U.S. dollar has eroded over time. You can input a dollar value between 1790 and 2004 and out how much it was worth in a different year. Several methods are used to determine the relative valuation, including CPI, GDP deflator, Unskilled wage, GDP per capital, and (relative share of) GDP.