A fourth result shown in the Table is, that the value of the corn obtained by ten men depends mainly upon the rate of profits, which again depends mainly upon the demand and supply of corn compared with labour. If corn be in such demand, that notwithstanding the fertility of the soil, a small quantity of it comparatively will purchase the labour required, profits will be very high, and the value of the produce will greatly exceed the constant value of the wages of the labour advanced; but if the supply of corn be so great, compared with labour, that a large quantity of it is required to purchase the given quantity of labour, profits will be low, and the excess of the value of the produce above the constant value of the advances in wages will be inconsiderable. Thus, when the produce is 150 quarters, if corn be in such plenty that each labourer is awarded thirteen quarters, the profits of stock will be only 15.38 per cent.; and this rate of profit, added to the constant value of the advances in labour, which are represented by 10, will make the natural value of the produce equal to 11.53. But if corn, notwithstanding the fertility of the soil, be only supplied in such quantities, compared with labour, as to award the labourer no more than ten quarters, the rate of profits, instead of 15.38 per cent., will be 50 per cent., and the value of the produce, instead of being 11.53, will be 15. This shows how greatly the natural value of commodities depends upon the average state of the demand and supply, and completely confirms the position in my last work, that the only difference between natural and market prices is, that the former are regulated by the average and ordinary relations of the demand to the supply, and the latter, when they differ from the former, upon the accidental and extraordinary relations of the demand to the supply. Fifthly, it follows, from the constant value of labour, that, Given the value of money in different countries, the natural prices of commodities, in which the same quantities of labour have been employed, will depend upon the rate and quantity of profits. Given the rate and quantity of profits, and the value of money, the natural prices of commodities in different countries will depend upon the quantity of labour employed upon them. And given the quantity of labour employed on them, and the rate and quantity of profits, the natural prices of commodities will depend upon the value of money. But in reality none of the ingredients of natural or money price are given, excepting the natural value of labour, and consequently the money prices of commodities which regulate the ordinary rate at which different countries exchange their commodities with each other, will be determined partly by the quantity of labour employed upon them, partly by the ordinary rate of profits, and partly by the value of money.