final result, a miscalculation. He means, not that the land of Great Britain would not now sell for what has been laid out upon it, but that it would not sell for that amount plus the expense of making all the roads, canals, and railways. This is probably true, but is no more to the purpose, and no more important in political economy, than if the statement had been, that it would not sell for the sums laid out on it plus the national debt, or plus the cost of the French Revolutionary war, or any other expense incurred for a real or imaginary public advantage. The roads, railways, and canals were not constructed to give value to land: on the contrary, their natural effect was to lower its value, by rendering other and rival lands accessible: and the landholders of the southern counties actually petitioned Parliament against the turnpike roads on this very account.
The tendency of improved communications is to lower existing rents, by trenching on the monopoly of the land nearest to the places where large numbers of consumers are assembled. Roads and canals are not intended to raise the value of the land which already supplies the markets, but (among other purposes) to cheapen the supply, by letting in the produce of other and more distant lands; and the more effectually this purpose is attained, the lower rent will be. If we could imagine that the railways and canals of the United States, instead of only cheapening communication, did their business so effectually as to annihilate cost of carriage altogether, and enable the produce of Michigan to reach the market of New York as quickly and as cheaply as the produce of Long Island the whole value of all the land of the United States (except such as lies convenient for building) would be annihilated; or rather, the best would only sell for the expense of clearing, and the government tax of a dollar and a quarter per acre; since land in Michigan, equal to the best in the United States, may be had in unlimited abundance by that amount of outlay. But it is strange that Mr. Carey should think this fact inconsistent with the Ricardo theory of
