do not exchange in the ratio simply of the quantities of labour required to produce them; not even if we allow for the unequal rates at which different kinds of labour are permanently remunerated. We have already illustrated this by the example of wine: we shall now further exemplify it by the case of commodities made by machinery. Suppose, as before, an article A made by a thousand pounds' worth of immediate labour. But instead of B, made by 500l. worth of immediate labour and a machine worth 500l., let us suppose C, made by 500l. worth of immediate labour with the aid of a machine which has been produced by another 500l. worth of immediate labour: the machine requiring a year for making, and worn out by a year's use; profits being as before 20 per cent. A and C are made by equal quantities of labour, paid at the same rate: A costs 1000l. worth of direct labour; C, only 500l. worth, which however is made up to 1000l. by the labour expended in the construction of the machine. If labour, or its remuneration, were the sole ingredient of cost of production, these two things would exchange for one another. But will they do so? Certainly not. The machine having been made in a year by an outlay of 500l., and profits being 20 per cent, the natural price of the machine is 600l.: making an additional 100l. which must be advanced, over and above his other expenses, by the manufacturer of C, and repaid to him with a profit of 20 per cent. While, therefore, the commodity A as sold for 1200l., C cannot be permanently sold for less than 1320l.
A second consequence is, that every rise or fall of general profits will have an effect on values. Not indeed by raising or lowering them generally, (which, as we have so often said, is a contradiction and an impossibility): but by altering the proportion in which the values of things are affected by the unequal lengths of time for which profit is due. When two things, though made by equal labour, are of unequal value because the one is called upon to yield profit for a greater num-
