The next difficulty we have to deal with is artificial lighting. Whether we employ candle, oil lamp, or gas, we may be certain that the atmosphere of our rooms will become contaminated by the products of combustion, and health must suffer. In order that such may be obviated, it must be an earnest hope that ere long such improvements will be made in electric lighting, that it may become generally used in our homes as well as in all public buildings. Gas has certainly proved itself a very useful and comparatively inexpensive illuminating power, but in many ways it contaminates the atmosphere, is injurious to health, and destructive to the furniture and fittings of our homes. Leakages from the mains impregnate the soil with poisonous matter, and it rarely happens that throughout a house there are no leakages. However small they may be, the air becomes tainted. It is almost impossible, at times, to detect the fault, or if detected, to make good without great injury to other work, in consequence of the difficulty there is in getting at the pipes, as they are generally embedded in plaster, etc. All gas pipes should be laid in positions where they can be easily examined, and, if necessary, repaired without much trouble. In France it is compulsory that all gas pipes be left exposed to view, except where they must of necessity pass through the thickness of a wall or floor, and it would be a great benefit if such were required in this country. The cooking processes which necessarily go on often result in unpleasant odors pervading our homes. I cannot say they are immediately prejudicial to health; but if they are of daily or frequent occurrence, it is more than probable the volatile matters which are the cause of the odors become condensed upon walls, ceiling, or furniture, and in time undergo putrefaction, and so not only mar the sweetness of home, but in addition affect the health of the inmates. Cooking ranges should therefore be constructed so as to carry off the fumes of cooking, and kitchens must be well ventilated and so placed that the fumes cannot find their way into other parts of the dwelling. In some houses washing day is an abomination. Steam and stife then permeate the building, and, to say the least, banish sweetness and comfort from the home. It is a wonder that people will, year after year, put up with such a nuisance. If washing must be done home, the architect may do something to lessen the evil by placing the washhouse in a suitable position disconnected from the living part of the house, or by properly ventilating it and providing a well constructed boiler and furnace, and a flue for carrying off the steam.