On admission to the hospital, the examination disclosed no important symptoms outside of the nervous and locomotor systems. She was unable to walk unless assisted. The pupils were large but reacted well to both light and accommodation, were equal in size, and regular. Slight nystagmus was present; there was no ptosis or strabismus; vision in the left eye was poor. The other cranial nerves showed no involvement. The tendon reflexes were all present and very lively; Babinski, Gordon, and Oppenheim signs were present on either side. The ataxia was marked, especially of the lower arms, and she had some difficulty in the alignment of the fingers. The sense of position of the limbs was very poor. There was some tremor, which was not of the intention type. The writing showed some incoördination. The speech showed nothing abnormal. =Mental examination= disclosed nothing of note objectively, but patient stated she could not think so clearly as she could formerly. The =diagnosis= would seem to lie between brain tumor,—which had been suggested to the patient by her physician,—multiple sclerosis, and neurosyphilis. The numerous neurological symptoms without any definite evidence of intracranial pressure were sufficient to rule out for the moment the consideration of brain tumor. The syndrome of multiple sclerosis is not complete, but the race, age, and onset, with the increasing and decreasing intensity of symptoms are very suggestive of this diagnosis. The symptoms, of course, are all consistent with neurosyphilis also, and while the patient denied any knowledge of syphilitic involvement, the examination of the blood and spinal fluid was made. The W. R. was negative in both the blood serum and spinal fluid. Further examination of the spinal fluid showed presence of globulin and an increase in the albumin content, 43 cells per cmm. and a “paretic” type of gold sol reaction. With the negative W. R. of both blood serum and spinal fluid, and with so much in favor of MULTIPLE SCLEROSIS, this diagnosis was made. 1. What is the relation of multiple sclerosis to syphilis? There is no definite relationship between multiple sclerosis and syphilis,—that is, multiple sclerosis is not a syphilitic disease; but the complete syndrome of multiple sclerosis is often given by a syphilitic involvement of the central nervous system (see case Lauder, 71).