253, 254, 255, 256, 357, 374, 379, 393, 409, 422, 429, 450 — for.

Gets around the necessity of following a pro¬ gressive qualitative change in productive power, because it heightens the intensity of the ground-rent considered thus far, coinciding prima facie irrational, since the total output and prices remain the same time, productiveness of labour, the profits.