It may now be permissible to examine into the extent to which a demand is created by legal-tender laws. If the article endowed with a legal-tender power is already used as the standard and as a medium of exchange, it is given no value which it did not have before. The customs and business habits of a country alone determine how much of the standard coin will be carried about and used in hand-to-hand purchases, and how much of the business will be performed by other media of exchange, such as checks or drafts. The decision of a country to adopt gold--when it had only paper before, as was the case in Italy--would create a demand for gold to an extent determined by the monetary habits of that country; and this demand has an effect, as was said, only in the proportion of this amount to the total supply in the world. This operation arises from choosing gold as the standard of prices and as the medium of exchange. To give this standard a legal-tender power in addition does not increase the demand for it, because the stamp on the coin does not in any way alter the existing habits of the community as to the quantity of money it will use. But in case an equal power to pay debts is given to fixed quantities of two metals, while each quantity so fixed has a different metallic value but the same denomination in the coinage, Gresham's law is set in operation with the result that the cheaper metal becomes the standard. After this change has been accomplished, the legal tender has no value-giving force. When the cheaper metal has become the standard, its legal-tender quality does not raise the value of the coin beyond the value of its content. This cheaper standard, in international trade, would be worth no more in the purchase of goods because it bore the stamp of any one country. Prices must necessarily be adjusted between the relative values of goods and the standard with which they are compared. If the standard is cheaper, prices will be higher, irrespective of legal-tender acts. Where two metals are concerned, then, the only effect of a legal-tender clause is an injurious one, in that the metal which is overvalued drives out that which is under-valued.