The author has compiled in this work the subject-matter of a series of lectures on the technical details of modern surgery. It is designed to meet the requirements of the students and assistants in surgery who are not familiar with the science of bacteriology and the prevention of wound infections. Its chapters are devoted to a clear and concise discussion of surgical bacteriology and infections. The mode of wound infection, the consequence of such infection and the various methods employed in the prevention of infections are treated in a consecutive and exhaustive manner. A chapter devoted to the preparation of ligature and suture material is especially complete and comprehensive. Some attention is given to operative technic, including a discussion of surgical needles and their uses, together with a description of the various kinds of sutures.