The proper view of capital is, that anything whatever, which a person possesses, constitutes his capital, provided he is able, and intends, to employ it, not in consumption for the purpose of enjoyment, but in possessing himself of the means of production, with the intention of employing those means productively. Now the means of production are labour, implements, and materials. The only productive power which anywhere exists, is the productive power of labour, implements, and materials. We need not, on this account, altogether proscribe the expression, "productive power of capital;" but we should carefully note, that it can only mean the quantity of real productive power which the capitalist, by means of his capital, can command. This may change, though the productive power of labour remains the same. Wages, for example, may rise; and then, although all the circumstances of production remain exactly as they were before, the same capital will yield a less return, because it will set in motion a less quantity of productive labour. We may, therefore, consider the capital of a producer as measured by the means which he has of possessing himself of the different essentials of production: namely, labour, and the various articles which labour requires as materials, or of which it avails itself as aids. The ratio between the price which he has to pay for these means of production, and the produce which they enable him to raise, is the _rate_ of his _profit_. If he must give for labour and tools four-fifths of what they will produce, the remaining fifth will constitute his profit, and will give him a rate of one in four, or twenty-five per cent, on his outlay. It is necessary here to remark, what cannot indeed by any possibility be misunderstood, but might possibly be overlooked in cases where attention to it is indispensable, viz., that we are speaking now of the _rate_ of profit, not the gross profit. If the capital of the country is very great, a profit of only five per cent upon it may be much more ample, may support a much larger number of capitalists and their families in much greater affluence, than a profit of twenty-five per cent on the comparatively small capital of a poor country. The _gross_ profit of a country is the actual amount of necessaries, conveniences, and luxuries, which are divided among its capitalists: but whether this be large or small, the rate of profit may be just the same. The rate of profit is the proportion which the profit bears to the capital; which the surplus produce after replacing the outlay, bears to the outlay. In short, if we compare the _price paid_ for labour and tools with what that labour and those tools will _produce_, from this ratio we may calculate the rate of profit.