whole would obtain it. Rent, therefore, unless artificially increased by restrictive laws, is no burden on the consumer: it does not raise the price of corn, and is no otherwise a detriment to the public than inasmuch as if the [pg 282] state had retained it, or imposed an equivalent in the shape of a land-tax, it would then have been a fund applicable to general instead of private advantage.
§ 3. Rent of Mines and Fisheries and ground-rent of Buildings, and cases of gain analogous to Rent.
Agricultural productions are not the only commodities which have several different costs of production at once, and which, in consequence of that difference, and in proportion to it, afford a rent. Mines are also an instance. Almost all kinds of raw material extracted from the interior of the earth—metals, coals, precious stones, etc.—are obtained from mines differing considerably in fertility—that is, yielding very different quantities of the product to the same quantity of labor and capital. There are, perhaps, cases in which it is impossible to extract from a particular vein, in a given time,