If you had not anticipated purging in the beginning, and the body has been embalmed arterially it will be necessary to stop the purging by the first method. A third method of preventing purging from the lungs and stomach is in the use of plaster of paris. In this method the plaster of paris is mixed thinly, then by means of a paper funnel, pour the liquid into the nose and mouth, then plug tightly with absorbent cotton as in method two. It requires only a short time for the plaster of paris to set and it has been found quite successful. Probably the only disadvantage of this method is that it is mussy and because of the rapid drying qualities of the plaster of paris the operator must work very quickly. =The Thoracic or Chest Cavity.=—Cavity embalming must be resorted to frequently in the chest or thoracic cavity for the reason that in certain diseases, especially tuberculosis, fluids cannot enter the diseased cavities, as the capillaries and small vessels are destroyed by the disease and the ends of the arteries securely plugged. If this were not so, the patient would have died of hemorrhage of those arteries, a thing which seldom takes place. Again in certain other diseases, especially pneumonia, the fluid cannot reach the diseased lung, either through the nutrient arteries or by the respiratory tract, because of the resistance offered. The nutrient arteries will be filled with coagulated blood and the bronchi, to a certain extent, with a bloody mucous. This being the case, the bacteria of putrefaction will begin to develop within the diseased portions of the lungs, and will be the cause of the purging so much dreaded by the embalmer. The thoracic cavity may be treated by one of several methods. A first method consists in passing a curved trocar into the trachea just above the sternum and injecting a strong embalming fluid into the bronchi. In cases of gangrene of the lung, the sputum has a very offensive odor, which may be disinfected by this method. But it must be remembered that the ends of the bronchioles which enter the diseased parts of lungs will be closed (from the nature of the disease), so that any fluid injected into the bronchi from the trachea will not reach the diseased part of the lungs. You will thus see that it is absolutely necessary to use a method in treating the thoracic cavity, whereby any mass of rotten tissue, which may be present, may become thoroughly saturated with the disinfectant. A second method written about the Robbins, is accomplished by inserting the trocar on both the right and left sides at the tops of the lungs, and at the bases. At the top of the lungs the trocar is introduced two inches outside the sternum just below the clavicle. The trocar may then be pushed in any direction, except toward the sternum, without injury to any of the larger vessels.