Among the concomitant symptoms the most necessarily and closely connected with the increased discharge of fluid is its increased ingestion, so that the disease has been called polydipsia instead of polyuria, it being assumed that the thirst is the initial and important symptom upon which the diuresis naturally depends. It has been observed in many cases, however, that the quantity of water drunk is very much below that which is passed. In the case last spoken of the water ingested in the form of drink was but a small fraction of the quantity of the urine, so that the patient drank but two or three pints while passing many gallons. In cases where the beginning of the disease has been carefully observed patients have distinctly stated that the increased discharge began before they felt increased thirst. This of course takes no account of the quantity of water contained in solid or semi-solid food. Polyphagia is occasionally seen, as in the oft-quoted case of Trousseau, the terror of restaurant-keepers. So intense is the craving for water that in several instances where attempts have been made to limit its amount the unfortunate patient has drained the chamber-pot. Emaciation is probably connected with increased metamorphosis, as indicated by the increased secretion of urea and phosphates. Dryness of the skin has been frequently noted, and has been said to mark the distinction between polyuria and polydipsia, in the former the skin being dry, and in the latter moist. In one case, however, where copious perspirations were noted, the patient stated positively that the polyuria began a number of days before increased thirst was experienced. In another very extreme case, attended, however, with no wasting, night-sweats occurred. Pruritus has been mentioned as affording another point in the resemblance which undoubtedly exists between the severer cases of this disease and diabetes mellitus. Dyspeptic symptoms have been noted in some cases, and oedema may take place, as in many wasting diseases. The nervous symptoms are perhaps the most important in the severer {30} cases. In some which have been examined post-mortem distinct nervous lesions have been found, such as the remains of tubercular meningitis, tumors involving the cerebellum, and softening of the floor of the fourth ventricle; in others the patients are known to have been syphilitic.