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.