Trasbot strongly recommends large doses of tartar emetic and iodide of potassium to reduce the blood pressure in the lungs, an advice which will be received with hesitation by those who dread the already paretic condition of the heart. His combination of iodide of potassium with digitalis will be more confidently resorted to. One drachm of the former may be given with a half drachm of the latter twice daily. With the advent of marked fever and other signs of pneumonia, the treatment for that disease should be resorted to. PULMONARY ŒDEMA. Causes, pneumonia, extra force of right heart or weakness of left, insufficiency of mitral valves, deflection of blood by obstruction in one portion of lung, pressure of tumor on pulmonary veins. Malignant œdema. Malignant catarrh. Bright’s disease. Anæmia. Parasitism. Symptoms, abnormal heart sound, or urinary secretion. Parasitism. Percussion shows flat sound auscultation lowered, respiratory murmur, heightened blowing. No crepitation. Expectoration serous. Prognosis grave. Treatment, attacks primary disease. Posture. Elimination. Dry capping. Heart tonic. A dropsy of the lung tissue may supervene in weak conditions, in the course of inflammatory disease of the lungs; it may also depend on an imperfect balance in the forces of the right and left heart respectively, which leads to the habitual throwing of blood pressure back upon the lungs. Still more frequently the congestion and dropsy depends on insufficiency of the mitral valves by reason of which a reflux of blood toward the lungs takes place at each heart beat. The pressure of tumors on the pulmonary veins may have a similar action. Obstruction of circulation in one portion of lung may cause an extra blood pressure on an adjacent one, and œdema so caused may be found especially in cattle and pigs in which the interlobular connective tissue is specially abundant. This may be seen in miliary tuberculosis in cattle, and it probably contributes to produce the extraordinary liquid collections that characterize lung plague. In cattle also malignant œdema may affect the lung, and an œdematous condition is sometimes met with in malignant catarrh. Bright’s disease is another cause, the uræmic dropsy finding a favorite seat of election in the loose lung tissue unsupported by solid tissues. The anæmia resulting from parasitism like distomatosis may similarly affect the lung. The _symptoms_ of pulmonary œdema will usually be complicated by those of the affection causing it. Thus modification of the first heart sound or of the urinary secretion, or the existence of parasitism, would furnish valuable indications.