Lobular patches of pneumonia are often found in process of organization (Autopsies 370, 421, 423, 433, 463, 472 and 473). Microscopic examination shows that whole lobules well defined by thickened septa are the site of chronic interalveolar inflammation and intraalveolar organization of exudate, whereas adjacent lobules are air containing and relatively normal. In the earlier stages of the process fibrin present within the alveoli is invaded by fibroblasts, mononuclear wandering cells and blood vessels but in the later stages fibrin has disappeared; the lumina of the alveoli are occupied by cellular fibrous tissue and in places the thickened alveolar walls and intraalveolar fibrous tissue have been fused to form wide patches of new tissue. With chronic bronchopneumonia confluent lobular consolidation occasionally has a gray ground upon which are scattered small yellow spots clustered about the small bronchi (Autopsies 421, 423 and 431). Microscopic examination has shown that the yellowish spots correspond to dilated bronchioles filled with purulent exudate and surrounded with alveoli containing many polynuclear leucocytes. In the interstitial tissue about the bronchiole and between adjacent alveoli plasma cells are often present in great number. Between these spots of subacute bronchiolar inflammation lung tissue is the site of interalveolar proliferation of fibrous tissue and intraalveolar organization of exudate. In all instances of chronic bronchopneumonia there has been peribronchial pneumonia in a zone encircling small bronchi with no cartilage and the smallest of the bronchi which have cartilage in their wall; thickening of interalveolar septa, organization of peribronchial fibrinous pneumonia and partial disappearance of alveoli have been described. In the following autopsy peribronchial fibroid pneumonia has been so advanced that conspicuous patches of gray white tissue surrounding bronchi have replaced in some parts of the lung a considerable part of the lung substance. =Autopsy 487.=—W. C., white, aged twenty-seven years, a farmer from Mississippi had been in military service twenty-one days. Illness began on September 17, fifty-five days before death, with chill, fever, cough, backache, pain in the chest and coryza. The patient was admitted two weeks after onset with the diagnosis of influenza. Eight days later his sputum was blood tinged and there were signs of bronchopneumonia. One month after admission the patient developed a rash and a diagnosis of scarlet fever was made. =Anatomic Diagnosis.=—Chronic bronchopneumonia with peribronchial fibroid induration; bronchiectasis; purulent bronchitis; abscesses at the bases of both lungs; seropurulent pleurisy on the left side. The body is much emaciated. The left pleural cavity contains 650 c.c. of opaque, dull yellow, thin, purulent fluid. The surface of the left lung is covered in spots by white partially organized fibrin.