generally obtains there, makes the value in use of the precious metals one of great urgency to them.(766)(767) Direct legislative or governmental provisions may operate in the same direction; as, for instance, the Japanese embargo laws which, not long since, limited all foreign trade to two foreign nations.(768) I intend to treat of the influence of taxation on the value of money, in a future work to be written by me, on the Political Economy of the State. Section CXXVI. Uniformity Of The Value In Exchange Of The Precious Metals. (Continued.) Most nations can satisfy their want of the precious metals, only through the medium of foreign trade. Hence they very naturally look upon the cost of production of the articles of export by the exchange of which they obtain the precious metals either directly or indirectly, as the cost of production of these metals themselves. But, the rule that all commodities of equal cost of production have equal value in exchange is applicable only within the limits of the same economic territory (§ 107), for it is frequently physically impossible, and still more frequently rendered difficult, by laws, customs and states of mind to transfer factors of production from one country to another simply on account of the more advantageous market they would there find. Thus, for instance, when England exchanges its cotton and woolen goods, and steel instruments for Mexican silver, the cost of production of the two equivalents may be very different, and the one party in this trade may permanently make a larger profit than the other.(769) According to § 101, that party will be most favored in whom the desire of holding to his own commodities is farthest from being out-weighed by his desire to obtain the other. But, at bottom, silver is no very indispensable article. Especially in highly civilized commercial communities, it is easiest to obtain substitutes for it, while the principal articles of English export are, for the most part, objects with which to satisfy wants rather urgent in their nature, very general, and of rapid growth; and which, besides, are not, to any extent, difficult of transportation. It is not a matter of surprise, therefore, that English commodities, in silver countries, are generally sold above the mean price between the English cost of production and the Mexican, for instance, or the cost of procuring them elsewhere; and that silver, on the other hand, is sold in England, under the same. But this lowers the price of the precious metals of the latter country in general. Hence a change in the channels of international trade, which in most countries is the only source of gold and silver, may make the price of the precious metals dearer in one place and cheaper in another, even when the conditions of the production of mines remain entirely unaltered.(770) In an isolated country, any amount of gold and silver whatever would, finally, as soon as