This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables. The transactions of this society contain few articles devoted to surgical treatment of the heart. Because it is not given to any one surgeon to have many of these cases, it is important for members of this society to report such cases in order that a considerable number of cases may be grouped collectively for individual study. Following this idea, it is my desire briefly to report two cases. REPORT OF CASES Case 1. —A man, aged 22, entered the Beth Israel Hospital, Boston, on Jan. 7, 1929. A week previously he had been struck on the left side of the chest by an automobile, and within three or four days pneumonia developed in the left lung. On entrance to the hospital the temperature was 104 F.; pulse rate, 120; respirations, 30, and blood pressure, 112 systolic and 56 diastolic. The sputum contained type IV pneumococci. Examination of the blood