=Case 75.= Mrs. Brown was a woman of 56, who for the past eight or ten years had been complaining of trouble in her legs. As she described it, at times her legs were so weak she could hardly stand; at other times there was considerable pain and numbness. She has always been considered “high strung”; that is, she had a very bad temper and lost control of herself almost entirely when she became excited. Her legs had been growing progressively worse, and for about a month prior to admission she had been unable to stand or walk. She had also lost control of her bladder. On account of her temper, it had been almost impossible to nurse her; no nurse would stay with her because of her scolding and fault-finding. Recently, she had been having fits of the blues. Her husband, who was seen before Mrs. Brown, was an old gentleman, over 70, who was chiefly remarkable from the fact that he had unequal, irregular pupils, which reacted neither to light nor accommodation; there was also a speech defect. The patient herself proved to be extremely irritable, as had been stated,—so much so that at times it seemed almost impossible to do anything for her. She was very querulous, constantly complaining, and not satisfied with anything that was done. Aside from this, her =mental examination= proved to be entirely negative; that is, there were no psychotic symptoms. The systematic =physical examination= gave the following significant findings: blood pressure, 160 systolic, 90 diastolic; no evidences, however, of peripheral arteriosclerosis. Patient was unable to walk or stand, and had no control over her bladder. The knee-jerks and ankle-jerks absent on both sides; ataxia in the leg movements; loss of sense of localization, with no tenderness over the nerve trunks; no atrophy, paralyses, or muscular asymmetry of the parts. The vibratory sense was maintained. Subjectively, the patient thought that the vibratory sense differed in the legs from that in the arms. Localization, touch, pain, heat, and cold responded to correctly. The arms showed nothing abnormal; there was no incoördination, dysmetria, or dysdiadochokinesis. Her pupils were equal, regular, and both reacted normally to light and accommodation.