wheat from his land, and by the employment of a second capital of 1000 l. , he obtain a further return of eighty-five, his landlord would have the power at the expiration of his lease, of obliging him to pay fifteen quarters, or an equivalent value, for additional rent; for there cannot be two rates of profit. If he is satisfied with a diminution of fifteen quarters in the return for his second 1000 l. , it is because no employment more profitable can be found for it. The common rate of profit would be in that proportion, and if the original tenant refused, some other person would be found willing to give all which exceeded that rate of profit to the owner of the land from which he derived it.
In this case, as well as in the other, the capital last employed pays no rent. For the greater productive powers of the first 1000 l. , fifteen quarters is paid for rent, for the employment of the second 1000 l. no rent whatever is paid. If a third 1000 l. be employed on the same land, with a return of seventy-five quarters, rent will