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Rh unless modified, as in many cases it is, by the competition of producers who are not peasants, or by the prices of foreign markets.

§ 3.Another anomalous case is that of slave-grown produce: which presents, however, by no means the same degree of complication. The slave-owner is a capitalist, and his inducement to production consists in a profit on his capital. This profit must amount to the ordinary rate. In respect to his expenses, he is in the same position as if his slaves were free labourers working with their present efficiency, and were hired with wages equal to their present cost. If the cost is less in proportion to the work done, than the wages of free labour would be, so much the greater are his profits: but if all other producers in the country possess the same advantage, the values of commodities will not be at all affected by it. The only case in which they can be affected, is when the privilege of cheap labour is confined to particular branches of production, free labourers at proportionally higher wages being employed in the remainder. In this case, as in all cases of permanent inequality between the wages of different employments, prices and values receive the impress of the inequality. Slave-grown will exchange for non-slave-grown commodities in a less ratio than that of the quantity of labour required for their production; the value of the former will be less, of the latter greater, than if slavery did not exist.

The further adaptation of the theory of value to the varieties of existing or possible industrial systems may be left with great advantage to the intelligent reader. It is well said by Montesquieu, "II ne faut pas toujours tellement épuiser un sujet, qu'on ne laisse rien à faire au lecteur. Il ne's'agit pas de faire lire, mais de faire penser."