It must be remembered that when a body is arterially injected after death, that the fluid only goes to the stomach walls and there ends in the capillary system. No doubt a little of this fluid will soak through into the inside of the stomach, and tend to preserve the contents of the stomach, but it must be added that if the stomach contains a considerable quantity of food and water, that there will not be enough fluid soak through the stomach wall to preserve the contents of the stomach and as a result gases arise which cause distention of the abdomen and perhaps purging from the mouth and nose. As a rule then it is safe to say that when we have purging from the mouth and nose, with a visible distention of the abdominal cavity, indicating gases in the stomach and the intestines that fluid has not reached the contents of the stomach and the fecal matter of the intestines, and therefore it will be necessary to introduce fluid to these parts, in order to preserve the contents, and prevent further formation of gases. The method for doing this will be given under cavity embalming. =The Small Intestines.=—The small intestine is a convoluted tube, extending from the pyloric end of the stomach to the ileo-caecal valve where it terminates in the large intestines. It fills up the greater part of the abdominal and the pelvic cavity. It is about twenty feet in length and gradually diminishes in size from the commencement to the termination. The small intestines are surrounded at the top and at the sides by the large intestines. The small intestines are held in place by the mesentery, a part of the peritoneum, which connects or fastens to the spine. The small intestines are divisible into three portions: Duodenum, Jejunum, and the Ileum. _Arteries._—The main arterial supply to the small intestines is through the superior mesenteric artery. The superior mesenteric vein withdraws the main part of the blood from the small intestines. =Duodenum.=—The duodenum has received its name from being about equal in length to the breadth of twelve fingers (ten inches). It is the shortest, widest and the most fixed part of the small intestines, being closely and firmly attached to the posterior abdominal wall. It is not covered by the mesentery. The upper half of the duodenum is in the epigastric region and the lower half is in the umbilical region. It is practically in the median line of the body. The duodenum is shaped like a horseshoe, the opening being directed toward the left. The arteries supplying the duodenum are the pyloric and the pancreatic duodenal branch of the superior mesenteric. The veins correspond to the arteries. The pancreatic duct and the bile duct empty into the duodenum at its middle portion. =Jejunum.=—The jejunum is the second portion of the small intestines, it derives its name from the latin word “jejunas,” meaning empty, because it was formerly supposed to be empty after death.