subject equally capable of being taxed directly as the rent of land. Like the rent of land, it is a net produce which remains after completely compensating the whole risk and trouble of employing the stock. As a tax upon the rent of land cannot raise rents; because the net produce which remains after replacing the stock of the farmer, together with his reasonable profit, cannot be greater after the tax than before it, so, for the same reason, a tax upon the interest of money could not raise the rate of interest; the quantity of stock or money in the country, like the quantity of land, being supposed to remain the same after the tax as before it.

The ordinary rate of profit, it has been shown in the first book, is everywhere regulated by the quantity of stock to be employed in proportion to the quantity of the employment,