The principles of diagnosis in acute abdominal disease; Method of diagnosis; Appendicitis; The differential diagnosis of appendicitis; Perforation of a Gastric or Duodenal Ulcer, and Acute Pancreatitis; Acute intestinal obstruction; Intussusception; Acute obstruction of the large intestine: cancer of the colon - volvulus; The early diagnosis of strangulated and obstructed hernias; Acute abdominal symptoms due to vascular lesions; acute abdominal symptoms in pregnancy and the puerperium; Ectopic gestation; Cholecystitis and other causes of acute pain in the right upper quadrant of the abdomen; The colics; The early diagnosis of abdominal injuries; The acute abdomen in the tropics; Acute abdominal disease with genito-urinary symptoms; The diagnosis of acute peritonitis; Diseases which may simulate the acute abdomen.