Fumigation of the rooms periodically is necessary to ensure the safety of the coming patients. Formaldehyde for fumigation purposes has largely superseded sulphur. When the room is ready for fumigation, the windows should be closed, the drawers of the furniture opened, all chinks stopped, the keyhole stopped with cotton, and the room left closed for twenty-four hours. It may then be opened, and, when thoroughly aired, is again ready for occupancy. The sheet method of fumigation, using a pint of formaldehyde to every 1,000 cubic feet of air-space, has been thoroughly tested and proven reliable. The drug is simply poured on the sheet, which is hung over a line in the room to be disinfected, which has been prepared as above directed. It should be remembered that formaldehyde has little or no power of penetration, and for this reason all possible surfaces of materials to be disinfected should be exposed. [Sidenote: The Daily Cleaning] In the daily cleaning, the work should be so divided throughout the entire hospital that the regular morning cleaning can be accomplished in a comparatively short time, leaving special cleaning to be completed later in the day. In order to accomplish this, it may be necessary to employ special cleaners by the hour. This does away with the necessity of providing meals and lodging for a large force of cleaners. By nine o’clock in the morning the halls and stairs should be in order, front steps and walks cleaned, wards swept and dusted and the whole interior presenting a neat appearance. “Dust in a hospital is not only dust, but danger.” Domestic cleanliness and hospital cleanliness are quite different terms. The hospital housekeeper owes it to the public and to the sick whom she serves to keep the wards and rooms in the best condition for the promotion of health. On the hardwood floors a soft hair brush will raise less dust than the ordinary broom. Wet tea leaves should be sprinkled whenever obtainable. The dust should be taken up frequently. The ward floors, unless polished, should be washed every day. It is well to change the water often and not use it too freely. Special attention needs to be given to corners. After each meal it will be necessary to brush up the crumbs. [Sidenote: Dusting]