This handbook was conceived primarily for the use of students and practitioners. It is written from the experience of its author, a fact which is responsible for its many virtues and perhaps for some of its limitations. Because of its intended audience and its self-imposed restrictions, much detail is omitted, primarily in the field of operative procedure. This is altogether proper. It is for these reasons and for its general high tone of excellence that this work may be highly recommended to those for whom it was written.