This form of nephritis is more insidious in character, developing more slowly and manifesting different characteristics, than those seen in some of the other types already mentioned. The condition is, as a rule, associated with heart symptoms and high blood pressure. The blood shows an increase in urea and other end-products of protein metabolism, whereas there is no manifest change in the metabolism of salt or water. The great increase in volume of urine voided would show an inability on the part of the kidneys to eliminate a highly concentrated urine. This hypothesis is further demonstrated in the urine tests. ~Urinalysis.~--Upon analysis the urine in these cases shows less albumen and fewer casts than found in other types of nephritis. The disease is manifested by slight headache, gastric disturbances, and a frequent desire to urinate. ~Dietetic Treatment.~--The treatment here depends upon the extent of the impairment of the functions of the kidney. If the damage is not extensive and the diagnosis has been sufficiently early to insure prompt improvement upon treatment, the diet is so directed as to prevent the occurrence of any of the acute symptoms. The patient is warned against overeating and drinking, over-exercise and nervous excitement. When it is possible, a change to a warm, dry climate is advisable with more rest and sleep and less work and worry. He is advised to eat less at meals and if hungry to eat a light lunch of milk or buttermilk with crackers in the mid-morning. The same dietary precautions must be taken in these disturbances as in other nephritic conditions, keeping always in mind the fact that the kidneys are the chief organs of excretion in the body, and through them must pass the majority of all end-products of nitrogen metabolism. ~Limiting the Nitrogen.~--The nitrogenous foods cannot be eliminated entirely, especially if, as is often the case, the individual suffers from chronic nephritis and is up and about attending to business; but they can be judiciously regulated in the diet. All such foods as fried foods, rich pastries, rich sauces and gravy, spices of all kinds, tea and coffee, celery and asparagus, must be avoided. ~Limiting the Fluids.~--von Noorden limits the amount of fluid to 1-1/4 liters per day. This does not include the water content of the various foodstuffs. He advises a period of observation to determine the amount best suited to the condition of the patient and reducing this amount from 250 to 150 c.c. a day until the desired quantity is reached. He advises a drinking day once a week, allowing the patient to drink as much water as he likes.