~Incipient Diseases~, especially tuberculosis and scurvy, may likewise cause a rise of temperature. The relief of either disease or the fever depends largely upon how quickly the conditions are discovered and the means instituted to overcome them. ~Metabolism in Febrile Conditions~ of children, as well as of adults, is rapidly increased, hence the energy output is greater, and for this reason the fluid intake must be augmented in order to eliminate the toxic substances produced as a result of the rapid breaking down of the body tissues. ~The Kidneys~ are more or less strained to eliminate the products of the increased metabolism and for this reason it is especially necessary to adjust the diet in order to limit, as far as possible, the foods which add to the burden already imposed upon the organs of excretion. ~The Skin~ is an organ of excretion which, under normal conditions, shares the work of the kidneys. In infectious conditions, accompanied by eruptions which more or less cover the entire surface of the body, this organ is temporarily out of commission, hence its work, as well as their own, must be accomplished by the kidneys. ~Dietetic Treatment~ in the majority of infectious diseases may be divided into three periods: Starvation, Fluid Diet, and Convalescent Diet. Starvation, during which time no food is given for twenty-four hours or longer, in order to allow the digestive apparatus to rest and to give time for any substance which may be causing the elevation of the temperature to pass from the body. This treatment is also wise because it furnishes an opportunity for the symptoms of the disease to manifest themselves; Fluid Diet, given when acute symptoms subside, and Convalescent Diet when danger from relapse is over. ~Scarlet Fever~ is treated with two main ideas in view--preventing the development of nephritis and relieving the condition should it develop. ~Dietetic Treatment~ is logically the only means of treating or relieving nephritis. For the first three weeks, during which time this complication is apt to develop, a milk diet is necessary. This may be in the form of whole milk, milk soups, malted milk, etc. At the end of this time, if there are still no symptoms of nephritis, a convalescent diet, beginning with cereals and soft toast and progressing through the simple digestible foods such as rice, baked potatoes, soft eggs, etc., may be given. This is continued until the patient is well on the road to recovery. Meat should not be added until practically all danger of nephritis is passed. ~Nephritis.~--If, during the course of the disease this complication, should develop, the treatment described for acute nephritis on page 336 should be immediately instituted. ~Diphtheria.~--Dangerous complications at times develop as a result of diphtheria, making the treatment of this disease of the utmost importance. Heart symptoms, pneumonia, albuminuria, and anemia are among the complications to be dreaded and combated.