Drinking-cups used in common are another source of {196} infection. Let each child have its own tin cup. The clothes-rack in a school also spreads infection. Room enough should be given to each hook to keep the hat and coat of one child from touching those of another, and a wooden partition standing out from the wall about eight inches should separate hook from hook. The janitor should wash the clothes-racks with the acid bichloride solution every time he sweeps. Suppose a child having diphtheria is found in school, or one is discovered as coming from a house where he was in contact with diphtheria. The discovery is made commonly after the child has been spreading infection for some days. Do not frighten the youngster, but find out from him what parts of the school-building he has been visiting. Then send him and the other children home. Rooms in which the child has not been are not infected, and only that which he has touched is infected in any case. Wet everything in the building and outhouses with which he possibly could have come in contact with the acid bichloride. Burn his books and papers, or, if this action may cause difficulty with parents, let him take his books home and inform the health officer of that fact. When he returns to school be sure of the history of his books. Use formalin or sulphur in the infected rooms, and classes may be begun again the next day. If within the week any child shows signs of sore throat send it home immediately. Sulphur must be burned when used as a disinfectant, and to be effectual four pounds should be burned for every 1000 cubic feet of air-space in the room. A teaspoonful of sulphur when burned will fill a house with choking, dangerous fumes, but two pounds of sulphur burned in an ordinary bedroom will have no effect whatever on the diphtheria bacillus and very little on any other disease. Sprinkling disinfectants about a house, and setting saucers containing disinfectants in rooms is nonsense--the quantity must be sufficient and be in actual contact with the contagion. A deodorant does not disinfect because it removes a stench. To burn sulphur set a coal-hod or an old tin pan on two bricks in the middle of the room, but see that there are no {197} holes in the bottom of the hod or pan through which burning sulphur could drip to the floor. For a like reason see that the pan is not too narrow nor too shallow. It is safer to set the bricks in a tub filled with water up to the top of the bricks. Use powdered sulphur in preference to the cakes sold by the druggists, and fire this sulphur with a red coal. The room should be moist with steam when the sulphur is set afire so that the fumes will act effectually. Leave it shut tightly for twenty-four hours.