The past and family histories were unimportant. Her illness began one week before admission with dizziness, headache, vomiting, cough, pains in back and legs, chilly sensations, and fever. She went to bed the day after. The acute onset became definitely worse and pains developed in her chest. On admission she was very weak, had a temperature of 101.4°F., a pulse of 120, and respirations of 40 per minute. The physical examination showed a very well developed and nourished woman who was cyanotic but not dyspnœic. The pharynx and tonsils were definitely injected. There were signs of consolidation at the base of the left lung. The pneumonic process gradually increased in the left, spread to the right, and involved the greater portion of both lungs. Otherwise the physical signs did not change greatly during her stay of thirteen weeks in the hospital. Thrombosis of the left femoral vein was diagnosed about two days before her death. The temperature curve was of interest. During the first two days in the hospital it remained at 104°F. For two weeks it was septic in character, being 102°F. in the morning and 104°F. in the afternoon. Then for thirty days it was practically constant at 102°F., only to become septic again, 98.6°F. in the morning and 103.4°F. in the afternoon, and it remained so until death. The pulse curve ran essentially parallel to the temperature curve, varying from 100 to 140 per minute. The respirations varied between 46 and 64 per minute. The sputum showed Type IV pneumococcus. The blood culture was negative. [Illustration: FIG. XXX. AUTOPSY NO. 169 (LEFT) AND AUTOPSY NO. 97 (RIGHT). THIS CONTRAST IN THE EXTENT OF INFLAMMATORY INVOLVEMENT BETWEEN NEIGHBORING LOBULES IS FREQUENTLY ENCOUNTERED. ] [Illustration: FIG. XXXIII. GANGRENE OF THE LUNG. ]