PALMIERI, in 1921, described the principle of an original method of obtaining a plastic model of the living heart by the aid of x-rays. Palmieri, who realized that the heart in silhouette is a record of the tangential rays, first obtained a series of films of the heart with the patient rotated at definite angles. Subsequently, these heart silhouettes were copied on cardboard and cut out. In the next stage of the procedure, he used a cutting wire, fastened to a fixed point representing the focus which followed the cardboard silhouettes in the order of their production. At the same time the wire cut off pieces of a plastic block, mounted on a turntable, to duplicate the various positions of the rotation of the patient. Thus was sculptured, for the first time, the model of a living organ. It is very simple to visualize a fluoroscopic adaptation of Palmieri's principle. There must be two synchronized turntables, one for the rotation of the patient and one for the rotation of the plastic block. Such an apparatus has been designed by Lysholm, in 1926, and by Schatzky, in 1928. For the purpose of cross-section drawing and localization, a similar apparatus has been developed. In such modifications, a writing system takes the place of the cutting system. Again the rotation of the record is synchronized with the rotation of the patient. The enveloping tangents can be produced by divergent rays exactly over the organ (Klason, 1929); the tangents can be obtained also by keeping the record in a stationary position overhead. Under such conditions the writing device moves with the fluoroscopic tube and screen which are made into a rigid system (Groedel, 1921). The fluoroscopic adaptation of Palmieri's method utilized a horizontal plane for the production of the record. Cross-section drawings are obtained overhead, with the patient in a sitting position. The entire apparatus occupies considerable space, and seems to be too elaborate when compared with its limited practical usefulness. It would seem that the development of an attachment for one's own vertical fluoroscope would be more practical than the specially built fluoroscopes mentioned. The attachment herein described was developed by the writer and built in his office. I. Attachment for the Method by Parallel Rays.—The attachment is built from maple wood, on a heavy base, 24 inches square, upon the center of which is mounted a horizontal circular turntable, 19 inches in diameters, to serve as a platform for the patient as he stands erect for the examination. Six inches from the center a vertical post is built to support the standing patient in the same position. The counterbalanced fluoroscopic screen and the recording system are mounted on a vertical frame attached to the solid base. A second turntable of similar construction is mounted perpendicular to the table which serves as a platform for the patient and as a mounting surface for the record.