It may be said then of two countries possessing precisely the same quantity of all the necessaries and comforts of life, that they are equally rich, but the value of their respective riches would depend on the comparative facility or difficulty with which they were produced. For if an improved piece of machinery should enable us to make two pair of stockings, instead of one, without additional labour, double the quantity would be given in exchange for a yard of cloth. If a similar improvement be made in the manufacture of cloth, stockings and cloth will exchange in the same proportions as before, but they will both have fallen in value; for in exchanging them for hats, for gold, or other commodities in general, twice the former quantity must be given. Extend the improvement to the production of gold, and every other commodity; and they will all regain their former proportions. There will be double the quantity of commodities annually produced in the country, and therefore the wealth of the country will be doubled, but this wealth will not have increased in value. Although Adam Smith has given the correct description of riches, which I have more than once noticed, he afterwards explains them differently, and says, "that a man must be rich or poor according to the quantity of labour which he can afford to purchase." Now this description differs essentially from the other, and is certainly incorrect; for suppose the mines were to become more productive, so that gold and silver fell in value, from the greater facility of their production; or that velvets were to be manufactured with so much less labour than before, that they fell to half their former value; the riches of all those who purchased those commodities would be increased: one man might increase the quantity of his plate, another might buy double the quantity of velvet; but with the possession of this additional plate, and velvet, they could employ no more labour than before; because as the exchangeable value of velvet and of plate would be lowered, they must part with proportionally more of these species of riches to purchase a day's labour. Riches then cannot be estimated by the quantity of labour which they can purchase. From what has been said, it will be seen that the wealth of a country may be increased in two ways: it may be increased by employing a greater portion of revenue in the maintenance of productive labour,--which will not only add to the quantity, but to the value of the mass of commodities; or it may be increased, without employing any additional quantity of labour, by making the same quantity more productive,--which will add to the abundance, but not to the value of commodities. In the first case, a country would not only become rich, but the value of its riches would increase. It would become rich by parsimony; by diminishing its expenditure on objects of luxury and enjoyment; and employing those savings in reproduction.