3. Is it safe to give large doses of salvarsan to a patient in a stupor? It is not a good plan to give a large dose to such a patient on account of the danger of sudden death. This is probably due as much to the strain put on the heart as it is to any effect on the nervous system, or specific arsenic effect. In this particular instance, a dose of 0.15 gm. was the initial injection and this was increased five centigrams per injection. =IMPROVEMENT IN PARETIC NEUROSYPHILIS (“general paresis”) may become evident only after several months of intensive treatment.= =Case 115.= Henry Ryan was a shipping clerk, 54 years of age, who was brought to the hospital following a convulsion. For a few months preceding this period, Mr. Ryan had been failing in his abilities. He had been very forgetful, showed no energy, and had become very irritable. He also complained of insomnia and of feeling nervous. On admission to the hospital, the most striking feature in the mental situation was that he claimed that he had not slept a wink for three months, and each day he would solemnly affirm that he had not slept at all the preceding night, although the records might show that he had slept eight hours. Argument was of no avail against this conviction. In addition, his memory was very poor; he showed little knowledge of current events, and had no ability with arithmetical problems. =Neurologically= viewed, the points of chief significance were contracted immobile pupils and a speech defect, especially noticeable on the repetition of test phrases. The whole picture was suggestive of general paresis, and this diagnosis was confirmed by the laboratory findings. It was found that the W. R. was positive in the blood and spinal fluid, that there was a pleocytosis, positive globulin reaction, excess of albumin, and a “paretic” gold sol reaction. Consequently, the diagnosis of GENERAL PARESIS seemed justified, although the patient denied any knowledge of a syphilitic infection.