To the teaching of rickets. Pfaundler (Münch. med. Woch., 1927, nos. 16-17), Vollmer (Deut. med. Woch., 1927, no. 39), Gyorgy (Klin. Woch., 1927, no. 13), Folkenlieim (D. m. W., 1927, no. 37), Hottinger and Stärlinger (D. m. W., 1927, no. 37)