The door should fit closely, a slight space only being left at the bottom to admit air. It should have a square hole, which is usually placed either at the top or bottom, for the poultry to enter to roost. A hole at the top is generally preferred, as it is inaccessible to vermin. The fowls ascend by means of a ladder formed of a slanting board, with strips of wood nailed across to assist their feet; a similar ladder should be placed inside to enable them to descend, if they are heavy fowls; but the evil is that, even with this precaution, they are inclined to fly down, as they do from high perches, without using the ladder, and thus injure their feet. A hole in the middle of the door would be preferable to either, and obviate the defects of both. These holes should be fitted with sliding panels on the inside, so that they can be closed in order to keep the fowls out while cleaning the house, or to keep them in until they have laid their eggs, or it may be safe to let them out in the morning in any neighbourhood or place where they would else be liable to be stolen. Every day, after the fowls have left their roosts, the doors and windows should be opened, and a thorough draught created to purify the house. During the winter months all the entrance holes should be closed from sunset to sunrise, unless in mild localities. Where there are many houses, they should, if possible, communicate with each other by doors, so that they may be cleaned from end to end, or inspected without the necessity of passing through the yards, which is especially unpleasant in wet weather. The doors should be capable of being fastened on either side, to avoid the chance of the different breeds intermingling while your attention is occupied in arranging the nests, collecting eggs, &c. See that your fowls are securely locked in at night, for they are more easily stolen than any other kind of domestic animals. A good dog in the yard or adjoining house or stable is an excellent protection. Every poultry-house should be lime-washed at least four or five times a year, and oftener if convenient. Vermin of any kind can be effectually destroyed by fumigating the place with sulphur. In this operation a little care is requisite; it should be commenced early in the morning, by first closing the lattices, and stopping up every crevice through which air can enter; then place on the ground a pan of lighted charcoal, and throw on it some brimstone broken into small pieces. Directly this is done the room should be left, the door kept shut and airtight for some hours; care too should be taken that the lattices are first opened, and time given for the vapour to thoroughly disperse before any one again enters, when every creature within the building will be found destroyed. It is said that a pair of caged guinea-pigs in the fowl-house will keep away rats.