The ninth collection of papers of "Del Centro," under Professor Izzo's direction, contains some valuable contributions.
The first article, on the roentgenologic exploration of the hearts in a group of 23 cases of mitral stenosis in adults by Laplace, is especially good. In addition to the standard measurements, the author describes how other signs may be of great usefulness. By a discussion of the skilful application of fluoroscopy and exposures at a distance of 2 meters (teleroentgenograms) on both anterior-posterior and oblique views, the author brings out some refined methods of detecting the progressive stages of mitral stricture.
The study is divided into sections on the heart and its borders, the mediastinum and the pulmonary fields around the heart. The cardiac changes are more or less progressive in a definite order. With regard to the anterior-posterior view, the author describes first the left border of the heart. Two types ae