Page:An Essay on the Principle of Population (1798).djvu/57

Rh manure and improve more completely what is already in tillage; till ultimately the means of subsistence become in the same proportion to the population as at the period from which we set out. The situation of the labourer being then again tolerably comfortable, the restraints to population are in some degree loosened; and the same retrograde and progressive movements with respect to happiness are repeated.

This sort of oscillation will not be remarked by superficial observers; and it may be difficult even for the most penetrating mind to calculate its periods. Yet that in all old states some such vibration does exist; though from various transverse causes, in a much less marked, and in a much more irregular manner than I have described it, no reflecting Rh