Before the child is removed from the sick-room for the first time he should have a disinfecting bath. This bath should be in a solution of bichloride of mercury, the strength of which should be one part to five thousand parts of water. The towels used to dry the patient after the bath should be fresh and should not have been in the sick-room. He should then be dressed in clothing which has never been in the sick-room. DISINFECTING THE SICK-CHAMBER How to Disinfect a Room.--The most efficient way to disinfect a room is by means of formaldehyde gas. This, however, requires a special apparatus which can only be used by one familiar with the process. In all large cities the Department of Health usually undertakes the disinfection of rooms after any contagious disease. The next best method is by sulphur. When sulphur is employed it should be used in the form of powder or in small pieces. This is placed in a shallow iron pan set on a couple of boards in a tub partly filled with water. The sulphur is moistened with alcohol before it is set on fire. It is always necessary, of course, before disinfecting by any process to make the room as nearly air tight as is possible. To accomplish this the windows must be tightly closed, the doors locked, and the cracks and keyhole sealed with pieces of paper or adhesive paper. The room should remain closed for six or eight hours, after which it should be thoroughly aired for several days. The After Treatment of a Disinfected Room.--The walls, ceiling, and all flat surfaces, such as mantels, window-sills, etc., should be washed with a fresh chloride of lime solution. The floor should be scrubbed with a four per cent. soda solution. All carpets and curtains, if any, should be removed, taken to a vacant lot and thoroughly beaten and then exposed to direct sunlight for a number of hours. The room should then be well aired again for a couple of days before it is again occupied. How to Disinfect the Bed Clothing and Clothes.--The surest way is to boil them for half an hour; otherwise they may be left in the room while it is being disinfected. Spraying the clothes with a spray of formaldehyde is an effective way of disinfecting them. MUMPS: EPIDEMIC PAROTITIS Mumps is a contagious disease. It is most common between the fourth and sixth years. Infants are rarely affected. The disease is not very contagious, direct contact being necessary to communicate it. Every case should be isolated for a period of three weeks from the beginning of the disease. The seat of the affection is the parotid gland which is located in front of and on a level with the ear. One or both glands may be affected at the same time or one may follow the other in succumbing. The duration of the disease from the time the swelling becomes noticeable is about ten days. It is contagious for a week after the swelling subsides. The period of incubation is from one to three weeks.