Let the hen be well fed and supplied with water before putting her on the nest. Whole barley and soft food, chiefly barley-meal and mashed potatoes, should be given to her when she comes off the nest, and she must have as much as she will eat, for she leaves the nest but once daily, and the full heat of the body cannot be kept up without plenty of food; or she may have the same food as the general stock. A good supply of water must be always within her reach. A good-sized shallow box or pan, containing fine coal-ashes, sand, or dry earth, to cleanse herself in, should always be ready near to the nest. She should be left undisturbed, and, as far as possible, allowed to manage her own business. When a hen shows impatience of her confinement, and frequently leaves the nest, M. Parmentier advises that half only of her usual meal should be given, after which she should be replaced on the nest and fed from the hand with hemp or millet seed, which will induce her to stay constantly on her eggs. Others will sit so long and closely that they become faint for want of food. Such hens should not be fed on the nest, but gently induced with some tempting dainty to take a little exercise, for they will not leave their eggs of their own accord, and feeding on the nest has crippled many a good sitter. It is not healthy for the hen to feed while sitting on or close by the nest, for she requires a little exercise and rolling in the dust-heap, as well as that the eggs should be exposed for the air to carry off any of that stagnant vapour which M. Reaumur proved to be so destructive to the embryo chickens; and it has also been shown by physiologists that the cooling of the eggs caused by this absence of the hen is essential to allow a supply of air to penetrate through the pores of the shell, for the respiration of the chick. When there are many hens sitting at the same time, it is a good plan to take them off their nests regularly at the same time every morning to feed, and afterwards give them an opportunity to cleanse themselves in a convenient dusting-place, and, if possible, allow them exercise in a good grass run. A hen should never be caught, but driven back gently to her nest.