Such is the extent of credit; but let it be remarked in connection, that, in all these innumerable and multifarious forms of it, in all the stupendous interchanges of Mine and Thine, the ultimate reference is to one sole standard of value, which is the value of the precious metals. The civilized world has adopted these as the universal solvent of its vast masses of obligation. It is assumed that some standard is indispensable; it is asserted to be the imperative duty of governments, if they would not make their exactions of taxes arbitrary, unequal, and oppressive,--if they would render the dealings of individuals mutual and just,--if they would preserve the property and labor of their subjects from the merciless caprices of the powerful, and keep society from reverting to a more or less barbarous state,--to supply a fixed and equable money-measure; and the majority of the governments have selected gold and silver as the best. As seemingly less changeable in quantity and value than anything else, as imperishable, as portable, as divisible, as both convenient and safe, the precious metals challenge superiority over every other product; and accordingly every contract and every debt is resolvable into gold and silver. From this fact, the reader will see at once the prodigious significance of those materials in the economy of trade, and the prime necessity that they should be not only uniform in value, but so equally distributed that they may be easily attainable when needed. Every change in their value is a virtual change in the value of the vast variety of obligations which are measured and liquidated by them; and every apprehension of their scarcity or disappearance, by whatever cause excited, is an apprehension of embarrassment on the part of all those who have debts to pay or to receive.