The literature of this subject is quite extensive, although widely scattered, and the author has brought together and summarized the records heretofore published. The following is the table of contents: Chapter 1, Historic; 2, Anatomy; 3, Etiology; 4, Frequency of the Various Separations; 5, Experiments in Pathologic Anatomy, and their Histologic Anatomy; 6, Pathologic Anatomy; 7, Symptoms; 8, Prognosis and Results; 9, Treatment. The remainder of the work is devoted to separation of the epiphyses of the upper extremity, separation of the epiphyses of the clavicle, separation of the epiphyses of the scapula, separation of the upper epiphysis of the humerus, separation of the lower end of the humerus before puberty, separation of the lower epiphysis of the humerus in youth, separation of the internal epicondyle of the humerus, separation of the external epicondyle, etc., separation of the upper epiphysis of the radius, thumb, metacarpal bones, phalanges; then follow articles