26. Unresolved bronchopneumonia with tubercle-like nodules of peribronchiolar consolidation best seen in lower lobe; bronchiectasis 268 27. Unresolved pneumonia with peribronchial formation of fibrous tissue; bronchiectasis 270 28. Unresolved pneumonia with bronchiectasis showing new formation of fibrous tissue about a greatly dilated bronchus of which the epithelial lining has been lost 271 29. Lobar pneumonia following measles 338 30. Unresolved bronchopneumonia with measles showing new formation of fibrous tissue about a bronchus and in immediately adjacent alveolar walls 342 31. Unresolved bronchopneumonia with measles showing a nodule of chronic fibrous pneumonia surrounding a respiratory bronchiole 343 32. Unresolved bronchopneumonia with measles showing chronic pneumonia about a respiratory bronchiole and alveolar duct 344 33. Experimental lobar pneumonia in the stage of gray hepatization produced by injection of Pneumococcus III into the trachea of a monkey 395 EPIDEMIC RESPIRATORY DISEASE THE PNEUMONIAS AND OTHER INFECTIONS OF THE RESPIRATORY TRACT ACCOMPANYING INFLUENZA AND MEASLES CHAPTER I THE ETIOLOGY OF INFLUENZA FRANCIS G. BLAKE, M.D.; THOMAS M. RIVERS, M.D.; JAMES C. SMALL, M.D. The bacteriologic investigation which will be described was made at Camp Pike, Arkansas, during the period of the influenza epidemic from September 6 to December 5, 1918. The data presented are limited to observations made during life in uncomplicated cases of influenza and to control studies in normal individuals, and in cases of measles. Bacteriologic studies made at autopsy will be described in a subsequent part of this report.