In the last four years, experimental and clinical research has developed three new phases of bile tract surgery: cholecystography, an understanding of gallbladder function, and early diagnosis of cholecystic lesions. This new work is essentially of the United States. One finds relatively little reflection on the bile tracts in this monograph, which essays to cover the entire subject of gallbladder surgery, There are chapters on anatomy, physiology, chemical formation of stones, bacteriology, colic, jaundice, complications, and medical and surgical management. There is little that is not contained in the older works on the bile tracts, and the brevity of the text and the scarcity of illustrations make the book of little use as a reference volume.