If the land which, in one state of cultivation, affords a revenue of ten millions sterling a year, would in another afford a rent of twenty millions; the rent being, in both cases, supposed a third part of the produce, the revenue of the proprietors would be less than it otherwise might be, by ten millions a year only; but the revenue of the great hotly of the people would be less than it otherwise might be, by thirty millions a year, deducting only what would be necessary for seed.