improvements. Some consist in a mere saving of labour, and enable a given quantity of food to be produced at less cost, but not on a smaller surface of land than before. Others enable a given extent of land to yield not only the same produce with less labour, but a greater produce; so that if no greater produce is required, a part of the land already under culture may be dispensed with. As the part rejected will be the least productive portion, the market will thenceforth be regulated by a better description of land than what was previously the worst under cultivation.
To place the effect of the improvement in a clear light, we must suppose it to take place suddenly, so as to leave no time during its introduction, for any increase of capital or of population. Its first effect will be a fall of the value and price of agricultural produce. This is a necessary consequence of either kind of improvement, but especially of the last.
An improvement of the first kind, not increasing the produce, does not dispense with any portion of the land; the margin of cultivation (as Dr. Chalmers terms it) remains where it was; agriculture does not recede, either in extent of cultivated land, or in elaborateness of method: and the price continues to be regulated by the same land, and by the same capital, as before. But since that laud or capital, and all other land or capital which produces food, now yields its produce at smaller cost, the price of food will fall proportionally. If one-tenth of the expense of production has been saved, the price of produce will fall one-tenth.
But suppose the improvement to be of the second kind; enabling the land to produce, not only the same corn with one-tenth less labour, but a tenth more corn with the same labour. Here the effect is still more decided. Cultivation can now be contracted, and the market supplied from a smaller quantity of land. Even if this smaller surface of land were of the same average quality as the larger surface, the price would fall one-tenth, because the same produce would be obtained with a tenth less labour. But since the
