ABSTRACT
Land, as a source of income, has products easy to acquire with fixed capital, with machines, mills, forges, mines, whose ownership also gives an income which, in order to be born, waits only to be developed by human labor. Land, like the machine, helps this labor and makes it more productive; the fruits of this labor comprise, together with the hire of the workman, in one case the hire of the land, in the other the hire of the machine which has worked like a human. National income consists of only two parts, one included in the annual product, the other outside of it: the first is the profit which springs from wealth, the second is labor power which springs from life. Thus, the national income and the yearly product are in mutual balance and seem to be equal quantities.
