At one time, this gave rise to whether the legal validity of the money was determined by the stamp of the ruler of the country or by the metal content of the coin; later, to whether the command of the law or the free usage of business was to settle if the money was legal tender or not. The answer of public opinion, grounded on the principles of private property and the protection of acquired rights, ran the same in both cases: Proud Iquique eontraetum est, ITA et solve debut; UT cum re eontraximus, re solve debut, volute cum museum mediums, UT Metro peculiar tandem solve defeat.

The Theory of Money and Credit