As the gross profit may be very different though the rate of profit be the same; so also may the absolute price paid for labour and tools be very different, and yet the proportion between the price paid and the produce obtained may be just the same. For greater clearness, let us omit, for the present, the consideration of tools, materials, &c, and conceive production as the result solely of labour. In a certain country, let us suppose, the wages of each labourer are one quarter of wheat per year, and 100 men can produce, in one year, 120 quarters. Here the price paid for labour is to the produce of that labour as 100 to 120, and profits are 20 per cent. Suppose now that, in another country, wages are just double what they are in the country before supposed; namely, two quarters of wheat per year, for each labourer. But suppose, likewise, that the productive power of labour is double what it is in the first country; that by the greater fertility of the soil, 100 men can produce 240 quarters, instead of 120 as before. Here it is obvious, that the real price paid for labour is twice as great in the one country as in the other; but the produce being also twice as great, the ratio between the price of labour and the produce of labour is still exactly the same: an outlay of 200 quarters gives a return of 240 quarters, and profits, as before, are 20 per cent. Profits, then (meaning not gross profits, but the rate of profit), depend (not upon the price of labour, tools, and materials--but) upon the ratio between the price of labour, tools, and materials, and the produce of them: upon the proportionate share of the produce of industry which it is necessary to offer, in order to purchase that industry and the means of setting it in motion. * * * * * We have hitherto spoken of tools, buildings, and materials, as essentials of production, co-ordinate with labour, and equally indispensable with it. This is true; but it is also true that tools, buildings, and materials, are themselves the produce of labour; and that the only cause (cases of monopoly excepted) of their having any value, is the labour which is required for their production. If tools, buildings, and materials were the spontaneous gifts of nature, requiring no labour either in order to produce or to appropriate them; and if they were thus bestowed upon mankind in indefinite quantity, and without the possibility of being monopolized; they would still be as useful, as indispensable as they now are; but since they could, like air and the light of the sun, be obtained without cost or sacrifice, they would form no part of the expenses of production, and no portion of the produce would be required to be set aside in order to replace the outlay made for these purposes. The whole produce, therefore, after replacing the wages of labour, would be clear profit to the capitalist.