Each pair of pigeons will need two nesting compartments. A good kind is described in Farmers' Bulletin No. 177, and is constructed as follows: Inch boards, twelve inches wide, with parallel cross cleats nailed on nine inches apart, are set upright full twelve inches apart against one wall, and securely fastened at top and bottom. Cut twelve-inch squares of inch boards for the bottoms of the nest boxes. It is easy to see how convenient these sliding bottoms will be to clean. Provide small earthenware dishes as nests, with a foundation of tobacco stems, to discourage lice. The birds will build nests of straw above the tobacco stems, the male bringing the material which the female arranges to suit her ideas of house furnishing. Some growers use sawdust in the nest. If your pigeons are allowed their liberty with no shelter save the pigeon loft, perches will be needed inside. As the pigeon's feet are formed for perching on flat surfaces instead of on rounded branches like many of their feathered relatives, you should provide what suits their needs. A good form of perch is made as follows. Cut half-inch, dressed material four or five inches wide into five or six-inch lengths. Nail together two of these pieces in v-shape. This can be nailed to a square foundation piece and hung angle up on the wall of the loft. The slanting sides afford no lodging for droppings and as only one bird at a time can perch on so small a place, quarrelling is avoided. Iron brackets with perches attached are also used. Two nest dishes are provided for each pair, as very often the hen will lay a second pair of eggs before the earliest young ones are ready to leave the nest. The male pigeon is untiring in his devotion to the young and their mother, taking his turn on the nest regularly during the seventeen days of incubation, doing his share of the work, and even beating his wife if she shows any disposition to slight her duties. If the pigeons are confined in a wire fly, perches should be provided there, and board walks for them to alight upon and walk about on should be placed at a distance of four or five feet from the ground. Nothing in the shape of roosts or cross pieces should be put in the fly, as the pigeons need all the space in which to exercise their wings. [Illustration: A fly for pigeons. Put no roosts across the fly. Flying against these would injure the birds] For one hundred birds the fly should be thirty-two feet long, eight feet high, and the entire width of the house. It will be a fine problem in practical arithmetic to figure how much netting will be required to cover the frame of this fly, how many posts, and how much one by four-inch stuff will be needed to complete the frame. The advice of some one who has built a pigeon fly would be most valuable to the inexperienced person, and the pictures in books, bulletins, and magazine articles will be helpful in making your plans.