In this paper we propose to consider to what extent the use of alcohol affects the course of lobar pneumonia. The influence of alcohol on longevity has been the subject of extensive studies in recent years by the insurance companies. These companies do not, of course, accept persons who admit the excessive use of liquor, and their comparisons, therefore, are between abstainers and moderate users. Dr. Rogers of the New York Life shows that in several large companies the mortality runs 32 per cent. higher in the group of moderate alcohol users than in the group of abstainers. The statistics of the Midwestern Mutual show that if abstainers are rated at 100 per cent., the mortality of moderate or occasional users of alcohol is 119 per cent.; that of daily users of beer is 133 per cent.; that of daily users of spirits is 166 per cent. The New England