The rapid development of the medical specialties has been one of the most conspicuous features of modern medical progress. It has been only a few years since the work in rhinology, for example, has been carried beyond the scope of the man doing general practice. The beginnings of laryngology antedate those of rhinology by but a few years, and the man who discovered the use of the laryngeal mirror passed away only last year. The men whose work laid the foundations for modern otology are, many of them, still living. The short period that has elapsed since the work in the several special fields was begun is in no way commensurate with the extent to which this work has been carried. There has developed in this short time for each of the specialties an enormous literature. In the fundamental sciences alone, in anatomy, in physiology, in embryology and in pathology