One teaspoonful of powdered chlorate of potash should be loosely stirred together with three table-spoonfuls of dry sand in an empty dry pickle bottle; add to this nearly an ounce of muriatic acid; stand the bottle on some warm embers in an old Australian-meat tin, or other receptacle of this kind, and place it (with the embers in it) on a shelf, or somewhere high up in the room, taking care not to scorch the wood-work. The heavy chlorine gas will descend and so fill all parts of the room, and in about three hours disinfection will be complete. It would be a good thing if district-visitors, and other charitable persons, would instruct the clergy and their poor people in such effectual means of stamping out infection. In all hospitals "Condy's solution" is placed with the water and towels for the use of the visiting medical men. It is highly advisable to keep this in every house for cleansing and disinfecting purposes, and for the removal of unpleasant smells. It is useful in cleansing bird-cages and gun-barrels, in preparing poultry or game, and in many other ways. The solution may be made at home. The British Pharmacopoeia allows four grains of the permanganate of potash (the basis of the solution) to the fluid ounce. It is chiefly for external use. The permanganate of potash is sold in crystals of two kinds: the most expensive is the purple, which is used in what is called the ozonized water, a very weak solution of permanganate, sold by chemists for toilet use. The cheaper and more general disinfectant is a greenish coarse powder, sold by any honest chemist at under five shillings a pound. It may be bought of the General Apothecaries' Company, 49, Berner's Street, London, for from three shillings a pound to three-and-sixpence, as it varies with the market; and this does as well as Condy's patent, and is 500 per cent. cheaper, as fourteen gallons of disinfectant may be prepared from a pound of the powdered crystals, and these again will be extensively diluted for use. The purple crystals may be bought by the ounce. Be cautious in using this fluid, or the Condy, whichever you may happen to prefer, as it turns almost everything brown that it touches. Very deep stains will never come out; slight stains wash and wear out after a time, but china and all white ware, and sponges and brushes, have their appearance greatly injured by it. Bed-room floors may be washed with it; they will be thoroughly purified, and the colour will be as if they were stained dark oak previous to being varnished. Stains will wear off the hands in a few days, and a weak solution will not discolour them. The purple fluid is a test of water--if it turns brown the water is impure. It decolorizes on contact with animal matter.