Each family of fowls should, if possible, have a house and run; and if they are kept as breeding stock, and the breeds are to be preserved pure, this is essential. And where many kinds are kept, the various houses must be adapted to the peculiarities of the different breeds, in order to do justice to them all, and to attain success in each. The size of the house and the extent of the yard or run should be proportioned to the number of fowls kept; but it is better for the house to be too small than too large, particularly in winter, for the mutual imparting of animal heat. It is found by experience that when fowls are crowded into a small space, their desire for laying continues even in winter; and there is no fear of engendering disease by crowding if the house is properly ventilated, and thoroughly cleansed every day. Mr. Baily kept for years a cock and four hens in a portable wooden house six feet square, and six feet high in the centre, the sides being somewhat shorter, and says such a house would hold six hens as well as four. Ventilating holes were made near the top. It had no floor, being placed upon the ground, and could be moved at pleasure by means of two poles placed through two staples fixed at the end of each side. A few Cochin-Chinas may be kept where there is no other convenience than an outhouse six feet square to serve for their roosting, laying, and sitting, with a yard of twice that size attached. Mr. Wright "once knew a young man who kept fowls most profitably, with only a house of his own construction, not more than three feet square, and a run of the same width, under twelve feet long." The French breeders keep their fowls in as small a space as possible, in order to generate and preserve the warmth that will induce them to lay; while the English breeders allow more space for exercise, larger houses, and free circulation of air. The French mode, is very likely the best for the winter and the English for the summer, but the two opposite methods may be made available by having one or more extra houses and runs into which the fowls can be distributed in the summer. A close, warm roosting-place will cause the production of more eggs in winter, when they are scarcest and most valuable, while air and exercise are necessary to rear superior fowls for the table; and if they can have the run of a farmyard or good fields in which to pick up grain or insects, their flesh will be far superior in flavour to that of fowls kept in confinement, or crammed in coops. Almost any outbuilding, shed, or lean-to, may be easily and cheaply converted into a good fowl-house by the exercise of a little thought and ingenuity. The best material to build a house with is brick, but the cheapest to be durable is board, with the roof also of wood, covered with patent felt. One objection to timber houses is their being combustible, and easily ignited, and houses had better be built of a single brick in thickness, unless cheapness is a great object.