A bed to be used in sickness should have the following dimensions--length, 6 ft. 6 in., height 24 to 26 inches, width, 36 inches. If a bed is either too high or too low the labor of lifting and moving the patient is greatly increased. If the bed is too narrow the patient is insecure. If the bed is too wide, its center is difficult or impossible to reach without leaning or kneeling upon it; and if too short, it will prove uncomfortable for a tall person. A bed that is too low may be raised on four heavy boxes of the same height; or still better, upon heavy wooden blocks which any carpenter can easily make, and which are well worth a little trouble to obtain. In the top of each block a hollow should be made into which the leg of the bed will fit after the castor has been removed. A broad firm stool or a low chair may be provided for a patient who has difficulty in getting in and out of a high bed. Beds with complicated attachments for moving patients are not recommended for family use. They are expensive, likely to get out of order, seldom needed, and generally unsatisfactory. In some surgical cases a bed with a firm, flat surface is necessary. Such a surface may be secured by placing between the mattress and springs two boards slightly separated, or one wide board with holes bored in it to afford ventilation. Wooden beds are undesirable: they are difficult to keep clean, they readily absorb moisture and odors, they cannot well be disinfected, and their solid frames prevent a free circulation of air. Moreover, it is almost impossible to render fit for use again a wooden bed into which vermin have once made their way. Folding beds and lounges even of the best type are unhygienic, usually too low for the patient's comfort, and often insecure. A bedstead should be wiped frequently with a damp cloth; if it is of enameled iron it may be washed with soap and water. The springs may be cleansed with a stiff brush dipped in kerosene oil. Excessive use of water upon the springs is likely to make them rust. MATTRESSES.--Various substances are used in the manufacture of mattresses, but nothing has yet been found that is as satisfactory as curled hair. It is light and clean and elastic, it does not readily absorb odors, and it is easily renovated. Although hair is more costly than other materials, a hair mattress may be used almost indefinitely if it is occasionally made over.