theory of money is, by the admission of this principle, stript of a great part of the mystery which apparently surrounded it. We must not forget, however, that this doctrine only applies to the places in which the precious metals are actually produced; and that we have yet to enquire whether the law of the dependence of value on cost of production applies to the exchange of things produced at distant places. But however this may be, our propositions with respect to value will require no other alteration, where money is an imported commodity, than that of substituting for the cost of its production, the cost of obtaining it in the country. Every foreign commodity is bought by giving for it some domestic production; and the labour and capital which a foreign commodity costs to us, is the labour and capital expended in producing the quantity of our own goods which we give in exchange for it. What this quantity depends upon,—what determines the proportions of interchange between the productions of one country and those of another,—is indeed a question of somewhat greater complexity than those we have hitherto considered. But this at least is indisputable, that within the country itself the value of imported commodities is determined by the value, and consequently by the cost of production, of the equivalent given for them; and money, where it is an imported commodity, is subject to the same law.
