Let there be a frequent change of linen, as in sickness it is even more necessary than in health, more especially if the complaint be fever. In an attack of fever clean sheets ought, every other day, to be put on the bed; clean body-linen every day. A frequent change of linen in sickness is most refreshing. If the complaint be fever, a fire in the grate will not be necessary. Should it be a case either of inflammation of the lungs or of the chest, a small fire in the winter time is desirable, keeping the temperature of the room as nearly as possible at 60° Fahrenheit. Bear in mind that a large fire in a sick-room cannot be too strongly condemned; for if there be fever—and there are scarcely any complaints without—a large fire only increases it. Small fires, in cases either of inflammation of the lungs or of the chest, in the winter time, encourage ventilation of the apartment, and thus carry off impure air. If it be summer time, of course fires would be improper. A thermometer is an indispensable requisite in a sick-room. In fever, free and thorough ventilation is of vital importance, more especially in scarlet fever; then a patient cannot have too much air; in scarlet fever, for the first few days the windows, be it winter or summer, must to the widest extent be opened. The fear of the patient catching cold by doing so is one of the numerous prejudices and baseless fears that haunt the nursery, and the sooner it is exploded the better it will be for human life. The valances and bed-curtains ought to be removed, and there should be as little furniture in the room as possible. If it be a case of measles, it will be necessary to adopt a different course; then the windows ought not to be opened, but the door must from time to time be left ajar. In a case of measles, if it be winter time, a _small_ fire in the room will be necessary. In inflammation of the lungs or of the chest, the windows should not be opened, but the door ought occasionally to be left unfastened, in order to change the air and to make it pure. Remember, then, that ventilation, either by open window or by open door, is most necessary in all diseases. Ventilation is one of the best friends a doctor has. In fever, do not load the bed with clothes; in the summer a sheet is sufficient, in the winter a sheet and a blanket. In fever, do not be afraid of allowing the patient plenty either of cold water or of cold toast and water; Nature will tell him when he has had enough. In measles, let the chill be taken off the toast and water. In _croup_, have always ready a plentiful supply of hot water, in case a warm bath might be required. In _child-crowing_, have always in the sick-room a supply of cold water, ready at a moment’s notice to dash upon the face.