wonder that any good-sized yard is without a martin house. Martins are content to live anywhere, in town or country. All they want is the right kind of a house with plenty of room around it, and they like some wires near by for perches.
It seems to me that a martin house, perched high in broad sunlight, needs ventilation. But this must be provided without causing drafts. It can be provided by making a half-inch horizontal slit on the inner walls just below the ceiling, something like the ventilation in a steamer cabin. Martins will not tolerate drafts. Then if the two topmost rooms in the martin house are made to connect by means of a hole two and a half inches in diameter, next to the ceiling, this will greatly assist the visiting scout. When English sparrows see the scout enter the house, they will lie in wait where he entered, expecting to molest him when he comes out. But if he can leave at another exit and get his colony while the sparrows still wait for him, they will have to surrender when he returns. It is a question of numbers. This kind of house, even though it have only six or eight rooms, will attract martins, and promise a good beginning in martin lore.
My neighbor, Mrs. Cotton, has now a martin house also. It has ten rooms, ventilated as described above and with the two upper rooms connecting. There being no telephone wires near enough, a wire running over the house on four uprights serves the same purpose.
