I NTRODUCTION. .-kB()uT a 'ea r ago Professor'Ilornson suggested to iie that it Would be intelesting to examine the medical histories of a serieis of cases of ervtlhenia nlodosutim, to see whetherthere was in anxr of thienm anla evidence of a definitelv tuberculous or rheumatic origin. Dr. Turkington18 lhas alread\y put the tuberculous theory before the Society, andl if the pr-eseint series sho...