=REMISSIONS of identical appearance occur in PARETIC and in DIFFUSE (non-paretic meningovascular) NEUROSYPHILIS.= =Case 23.= Thomas Donovan, a merchant 44 years of age, acquired syphilis according to his own story at the age of 31, and he was at that time treated at a well-known watering-place with mercurial injections. Later he continued treatment under his family physician, and at 34 was pronounced cured. However, four years later—that is seven years after his initial infection and in his 38th year—he had his blood examined and it proved positive. He was accordingly treated by salvarsan and his W. R. became negative. The story did not end there, however, for at 43, mental symptoms appeared of the nature of depression and a diagnosis of paresis was made. He was released from the institution against advice at that time, and without treatment, made a partial recovery. A sudden outburst of violence brought Mr. Donovan to the Psychopathic Hospital; he was very surly, combative, and difficult to manage, standing 6′ 2″, and weighing 210 pounds. He was oriented only fairly well and his surliness was streaked with humor. He facetiously said that the Psychopathic Hospital was the largest hospital in the country, and that it was, in fact, a horse hospital; that he had come because he liked the surroundings, not to make money; that he was the healthiest man in the world, never having been sick; that the Psychopathic Hospital was a club, for which you have to get somebody to propose your name. There was amnesia and no knowledge of current events. He regarded the food as poisoned, refused to eat, and was very irritable and untidy. =Physically=, there were few abnormalities, but the pupils failed to react either to light or accommodation, and the knee-jerks and ankle-jerks were absent. There was a slight Rombergism. There was a marked speech defect to test phrases. Both serum and spinal fluid W. R.’s were positive; the fluid showed 41 cells per cmm., there were large amounts of globulin and albumin, and the gold sol reaction was of the “paretic” type. =ATAXIA OR INCOÖRDINATION= NEUROSYPHILIS LESION OF PERIPHERAL SENSORY NERVES DIVISION OF POSTERIOR ROOTS TUMORS OR CHRONIC SCLEROSIS OF POSTERIOR COLUMNS SUBACUTE COMBINED DEGENERATION VESTIBULAR ATAXIA FRIEDREICH’S ATAXIA FAMILY PROGRESSIVE HYPERTROPHIC NEURITIS THROMBOSIS POSTERIOR INFERIOR CEREBELLAR ARTERY MARIE’S HEREDITARY CEREBELLAR ATAXIA LESIONS OF CEREBELLUM, TUMORS, ETC. WRITERS’ CRAMP PREHEMIPLEGIA MULTIPLE SCLEROSIS PSEUDO-SCLEROSIS HYSTERIA CHART 18 =CONDITIONS IN WHICH VERTIGO IS FOUND=