amount of wages depends partly on the comparative quantities of labour required, and partly on the comparative rates of its remuneration.
XII. So, the comparative rate of profits does not depend on what profits are in themselves; nor do high or low profits make high or low values. It depends partly on the comparative lengths of time during which the capital is employed, and partly on the comparative rate of profits in different employments.
XIII. If two things are made by the same quantity of labour, and that labour paid at the same rate, and if the wages of the labourer have to be advanced for the same space of time, and the nature of the employment does not require that there be a permanent difference in their rate of profit; then, whether wages and profits be high or low, and whether the quantity of labour expended be much or little, these two things will, on the average, exchange for one another.
XIV. If one of two things commands, on the average, a greater value than the other, the cause must be that it requires for its production either a greater quantity of labour, or a kind of labour permanently paid at a higher rate; or that the capital, or part of the capital, which supports that labour, must be advanced for a longer period; or lastly, that the production is attended with some circumstance which requires to be compensated by a permanently higher rate of profit.
XV. Of these elements, the quantity of labour required for the production is the most important: the effect of the others is smaller, though none of them are insignificant.
XVI. The lower profits are, the less important become the minor elements of cost of production, and the less do commodities deviate from a value proportioned to the quantity and quality of the labour required for their production.
XVII. But every fall of profits lowers, in some degree, the cost value of things made with much or durable
