The Wealth of Nations by Part 1 Chapter 11 Page 235

some time past, its price may very probably rise still higher than it is at present.

Between that period in the progress of improvement which brings to its height the price of so necessary an article as cattle, and that which brings to it the price of such a superfluity as venison, there is a very long interval, in the course of which many other sorts of rude produce gradually arrive at their highest price, some sooner and some later, according to different circumstances.

Thus in every farm the offals of the barn and stables will maintain a certain number of poultry. These, as they are fed with what would otherwise be lost, are a mere save-all; and as they cost the farmer scarce anything, so he can afford to sell them for very little.

Almost all that he