The two outbreaks of epidemic encephalitis which occurred during the years 1918 and 1919 and the almost endemic condition which has continued during the year 1920 have served to provide us with material which has enriched our knowledge of the physiology and pathology of the central nervous system. Within the annals of medical history, we look in vain for records which can vie with the pages which have been written on neurologic symptomatology and pathology during the last three years. No system has been spared the ravages of this disease, and true to form, each system has stamped its signature on some one or other form of this most varied syndrome.
Prior to our more intimate and extensive knowledge of this disease, we had granted with but little or no discussion the dictum that syphilis was par excellence the master mummer of medical and neurologic science. We formerly believed that