This rather small volume is devoted to the establishment of general principles as applied to the teaching of surgery. The authors point out that deviations from normal health are due to changes in the body caused by external or internal stimuli, which may be divided into two main groups: noninfective— mechanical, thermal, chemical, electrical, x-ray—and infective. A proper understanding of surgery consists in an understanding of how these harmful stimuli or irritants affect the body and how nature overcomes these changes. These facts constitute the general principles and the authors in this textbook are concerned with the presentation of these principles and their constant, forceful repetition and illustration by cases. The volume is not a complete textbook of surgery. The subjects taken up include shock, hemorrhage, infection, inflammation, wounds, inflammatory fever, effects of interference with blood supply of tissues, suppuration, specific infectious diseases, ulcers, gangrene, syphilis, tuberculosis, malignant disease, the