The first edition appeared in 1925. As pointed out at that time, this little volume takes up a number of research problems. In the present edition there are three additional chapters, one on extravasation of bile, a second describing acute ascending parenchymatous enteritis causing paralytic ileus, and an article on shock and collapse, with especial reference to acute abdominal disease. The chapter on bile includes some interesting points with reference to the histology of the gallbladder, as well as excellent clinical descriptions. The chapter on enteritis covers a subject apparently unrecognized heretofore and offers an interesting avenue of thought. The chapter on shock is excellent. Books of this type are too few.