Abrahams, Hallows and French had an opportunity of observing over 400 autopsies upon the influenza patients, and they comment upon the infrequency of cardiac dilatation. A slight dilatation of the right ventricle was seen in a few cases, and in no instance did they find pericarditis or endocarditis. They comment upon the heart condition as follows: “The most remarkable feature about the heart is the general absence of dilatation. In quite a large proportion of cases there has been no trace of dilatation; in a fair number of others there has been some dilatation of the right side, but this has seldom been extreme, perhaps enough to cause the apex of the heart to be formed about equally by right and left ventricles. Most often the heart has appeared of normal dimensions and the apex has been formed entirely by the left ventricle. This absence of dilatation accounts for the clinical absence of orthopnœa.” In direct contradiction to the above findings, the Advisory Board to the D. G. M. S., France, report the findings in 30 autopsies of clinical influenza. Twenty-nine of these 30 cases showed dilatation of the heart, chiefly of the right side, but very commonly of the left side as well. Twenty-one showed myocarditis and two endocarditis. In this report it is stated that these patients showed evidence of obsolete tuberculosis. It is possible that the condition of the patients and the presence of an unusual complicating infection led to the high incidence of cardiac involvement. The figures in this last series are much too high when compared with the frequency of heart involvement as found by the majority of other investigators. A number of heart lesions not resulting from influenza were observed. For none of them was there an antecedent history, but in some cases the condition may have had an influence in causing accessory cardiac embarrassment. One case had a chronic interstitial myocarditis of the rheumatic type, three had mild grades of chronic sclerotic mitral endocarditis, one a bicuspid pulmonary valve and three showed old pericardial adhesions, one of them having a complete obliteration of the sac. The foramen ovale was patent in six of the hearts. _Arteries_