~Development of Nephritis.~--Nephritis must be guarded against. The skin, being covered with a rash, is put out of commission as an excretory organ; in consequence all of the work of this description is placed upon the kidneys. In the first part of this text the work of the kidneys was defined; it was found that they were the chief organs for the excretion of the end-products of protein metabolism. It can be readily understood that when these organs are given not only their own work but that of the other organs to perform, unless the food requiring the greatest amount of effort on the part of the kidneys is confined to those types which can be most easily taken care of, such as milk, the kidneys stand a great chance of becoming impaired. Such is the case in nephritis. ~Convalescent Treatment.~--The return to normal diet must be made with the greatest caution. Specimens of urine must be taken often, for in this way alone can the development of nephritis be reckoned with.[87] Should nephritis develop in spite of efforts to prevent it, a farinaceous diet[88] such as is given in these conditions must be resorted to. After three weeks, if the patient shows no disposition toward nephritis, and if convalescence is progressing satisfactorily, the diet may be increased day by day, adding milk toast, cereals, cream soups, rice, baked potato, then custards and soft eggs, the soft part of oysters, broiled or baked fish, broiled breast of chicken, and, still later, rare beef and lamb chops. Meat, however, must not be given until all danger from nephritis has passed. DIPHTHERIA ~Diphtheria.~--The feeding in diphtheria follows the regime given in acute fevers. The body must be kept in good condition. At the same time it is necessary to understand the complications which make the dietetic treatment of this disease assume a place of importance. ~Complications.~--It may be complicated by broncho-pneumonia, albuminuria, carditis, endocarditis, and dilatation of the heart. Anemia must be combated, but care should be used not to push the diet to such an extent as to impose too great a tax upon the already weakened heart. ~Dietetic Treatment.~--While the fever lasts the diet must be fluid, milk, buttermilk, malted milk, and some of the proprietary infant foods such as Mellin's Food, Eskay's Food, and like preparations. Milk gruels, made with milk and some cereal such as farina, barley flour, fine cornmeal, arrowroot, strained oatmeal, etc., are at times more easily swallowed than the unthickened liquids. Liquid beef peptonoids, panopeptone, and like predigested beef preparations prove valuable in many cases. ~Convalescent Diet.~--As convalescence progresses, or in cases where the patient finds it easier to swallow a semi-solid than a liquid, soft custards, gelatin, well-cooked cereals, and ice cream may be given. Eggnog and milk punch are at times given, but only upon the advice of the physician in charge.