CHEW, SAMUEL C., M.D., Professor of Materia Medica, Therapeutics, and Clinical Medicine in the University of Maryland, Baltimore. CUTLER, ELBRIDGE G., M.D., Clinical Instructor in Auscultation in the Harvard Medical School; Physician to Out-Patients, Massachusetts General Hospital. DACOSTA, J. M., M.D., LL.D., Professor of Theory and Practice of Medicine in the Jefferson Medical College, Philadelphia. DAVIS, N. S., M.D., LL.D., Professor of Principles and Practice of Medicine in the Chicago Medical College, Chicago. DONALDSON, FRANK, M.D., Clinical Professor of Diseases of the Throat and Chest in the University of Maryland, Baltimore. ELSBERG, LOUIS, A.M., M.D., Late Professor of Laryngology and Rhinology in the New York Polyclinic and in Dartmouth Medical College; Physician to Charity Hospital, Blackwell's Island (Throat Wards), New York. FLINT, AUSTIN, M.D., Professor of the Principles and Practice of Medicine and Clinical Medicine in the Bellevue Hospital Medical College, New York. GARLAND, G. M., M.D., Formerly Professor of Thoracic Diseases in the University of Vermont, and Assistant in Clinical Medicine in Harvard Medical School. GEDDINGS, W. H., M.D., Aiken, South Carolina, and Bethlehem, N.H. JACOBI, ABRAHAM, M.D., Clinical Professor of Diseases of Children in the College of Physicians and Surgeons, New York, etc. JOHNSON, HOSMER A., M.D., LL.D., Emeritus Professor of Practical Medicine in the Chicago Medical College, Chicago. LEFFERTS, GEORGE M., A.M., M.D., Professor of Laryngoscopy and Diseases of the Throat in the College of Physicians and Surgeons, New York; Consulting Laryngoscopic Surgeon to St. Luke's Hospital, etc. LONGSTRETH, MORRIS, M.D., Physician to the Pennsylvania Hospital, Philadelphia. LOOMIS, ALFRED L., M.D., LL.D., Professor of Pathology and Practice of Medicine in the University of the City of New York. LYNCH, JOHN S., M.D., Professor of Principles and Practice of Medicine in the College of Physicians and Surgeons, Baltimore. OSLER, WILLIAM, M.D., Professor of Clinical Medicine in the University of Pennsylvania; formerly Professor of the Institutes of Medicine in McGill University, Montreal. PEPPER, WILLIAM, M.D., LL.D., Professor of the Theory and Practice of Medicine and of Clinical Medicine in the University of Pennsylvania, Philadelphia. ROBERTS, JOHN B., A.M., M.D., Professor of Applied Anatomy and Operative Surgery in the Philadelphia Polyclinic and College for Graduates in Medicine. ROBINSON, BEVERLEY, M.D., Clinical Professor of Medicine in the Bellevue Hospital Medical College, New York. SEILER, CARL, M.D., Instructor in Laryngoscopy in the University of Pennsylvania; Professor of Acoustics and Vocal Physiology at the National School of Oratory, Philadelphia.