production, and this relation or ratio the interaction of labor and capital constantly maintains; hence interest must rise and fall with the rise and fall of wages.
To illustrate: The price of flour is determined by the price of wheat and cost of milling. The cost of milling varies slowly and but little, the difference being, even at long intervals, hardly perceptible; while the price of wheat varies frequently and largely. Hence we correctly say that the price of flour is governed by the price of wheat. Or, to put the proposition in the same form as the preceding: There is a certain relation or ratio between the value of wheat and the value of flour, fixed by the cost of milling, which relation or ratio the interaction between the demand for flour and the supply of wheat constantly maintains; hence the price of flour must rise and fall with the rise and fall of the price of wheat.
Or, as, leaving the connecting link, the price of wheat, to inference, we say that the price of flour depends upon the character of the seasons, wars, etc., so may we put the law of interest in a form which directly connects it with the law of rent, by saying that the general rate of interest will be determined by the return to capital upon the poorest land to which capital is freely applied—that is to say, upon the best land open to it without the payment of rent. Thus we bring the law of interest into a form which shows it to be a corollary of the law of rent.
We may prove this conclusion in another way: For that interest must decrease as rent increases, we can plainly see if we eliminate wages. To do this, we must, to be sure, imagine a universe organized on totally different principles. Nevertheless, we may imagine what Carlyle would call a fool's paradise, where the production of wealth went on without the aid of labor, and solely by the reproductive force of capital—where sheep bore ready-made clothing on their backs, cows presented but-
