_Treatment._—Use the precautions observed in the treatment for septicemia. Give the body a complete arterial injection using half strength fluid for the first bottle of the injection. Drain as much blood from the veins as possible. Thrombi may complicate the drainage, and if none can be obtained from several of the larger veins, tap the heart as a last resort. Disinfect the blood before disposing of it. Streptococcus infection of the embalmer from abrasions of the skin is very dangerous and every possible precaution should be carefully taken. Give the body a complete cavity injection. For transportation, govern yourself according to the provisions of the transportation rules. CHAPTER XX. TREATMENT OF SPECIAL DISEASES.—Continued. DISEASES OF THE RESPIRATORY SYSTEM. =Gangrene of the Lung.=—_Definition._—A putrefactive necrosis of the lung. _Cause._—Many putrefactive bacteria thrive in the necrotic soil, but whether they are the cause or the result is not known. _Pathology._—When the gangrene is due to the plugging of one of the large branches of the pulmonary artery, a large part of the lung becomes dark, greenish brown, or a black fetid mass, softening rapidly in the center, forming an irregular cavity, containing a foul-smelling disgusting, greenish fluid. _Treatment._—Give complete arterial injection. Inject the pleural sac on the affected side through the first intercostal space or through the apex of the cavity. Spray fluid into the mouth and nose and close them with absorbent cotton. For shipment of these cases govern yourself according to the transportation rules. =Pulmonary Hemorrhage.=—_Synonyms._—Hemoptysis; Broncho-pulmonary hemorrhage; Bronchorrhagia; Pneumorrhagia. _Definition._—An expectoration of blood, due to hemorrhage from the mucous membrane of the bronchi, trachea, or larynx and from erosion or rupture of capillaries in lung cavities. _Cause._—The hemorrhage may result from congestion of the lungs, due either to pulmonary lesions or from cardiac derangements. It may accompany malignant affections, infectious fevers, scurvy, cancer of the lung, gangrene, and abscess of the lung. _Pathology._—There is, in most cases rupture of the capillaries of the bronchial mucous membranes. If tubercular cavities are formed, a ruptured aneurism is sometimes seen, or large blood vessel eroded by ulceration. If pulmonary apoplexy has existed, the parenchyma may be lacerated.