Thus, in every farm, the offals of the barn and stable 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 any thing, so he can afford to sell them for very little. Almost all that he gets is pure gain, and their price can scarce be so low as to discourage him from feeding this number. But in countries ill cultivated, and therefore but thinly inhabited, the poultry, which are thus raised without expense, are often fully sufficient to supply the whole demand. In this state of things, therefore, they are often as cheap as butcher's meat, or any other sort of animal food. But the whole quantity of poultry which the farm in this manner produces without expense, must always be much smaller than the whole quantity of butcher's meat which is reared upon it; and in times of wealth and luxury, what is rare, with only nearly equal merit, is always preferred to what is common. As wealth and luxury increase, therefore, in consequence of improvement and cultivation, the price of poultry gradually rises above that of butcher's meat, till at last it gets so high, that it becomes profitable to cultivate land for the sake of feeding them. When it has got to this height, it cannot well go higher. If it did, more land would soon be turned to this purpose. In several provinces of France, the feeding of poultry is considered as a very important article in rural economy, and sufficiently profitable to encourage the farmer to raise a considerable quantity of Indian corn and buckwheat for this purpose. A middling farmer will there sometimes have four hundred fowls in his yard. The feeding of poultry seems scarce yet to be generally considered as a matter of so much importance in England. They are certainly, however, dearer in England than in France, as England receives considerable supplies from France. In the progress of improvements, the period at which every particular sort of animal food in dearest, must naturally be that which immediately precedes the general practice of cultivating land for the sake of raising it. For some time before this practice becomes general, the scarcity must necessarily raise the price. After it has become general, new methods of feeding are commonly fallen upon, which enable the farmer to raise upon the same quantity of ground a much greater quantity of that particular sort of animal food. The plenty not only obliges him to sell cheaper, but, in consequence of these improvements, he can afford to sell cheaper; for if he could not afford it, the plenty would not be of long continuance. It has been probably in this manner that the introduction of clover, turnips, carrots, cabbages, &c. has contributed to sink the common price of butcher's meat in the London market, somewhat below what it was about the beginning of the last century.