This work concerns itself mainly with diagnosis of abdominal tumors, to which the author refers as "oncoquiliagnosis." In volume I a general study of the abdomen as to its physical characteristics, history and physical examinations of the patient, which embraces laboratory methods, are presented. The specialized part comprises diagnostic points concerned with internal and external hernias, tumors of the peritoneum, the intestinal tract and pathologic entities of the liver. The entire presentation, which is thorough, deals with the diagnosis and differential diagnosis of abdominal tumors. The author stresses the necessity of resort to all available means to arrive at a correct preoperative diagnosis wherever possible. In volume II the author discusses diagnostic features of the gallbladder, spleen, large omentum, kidneys, pancreas, bladder and sympathetic nervous system; the material gathered here is as thorough as that in the first volume. In the chapter on the biliary passages a great deal of