Von Professor Dr. P. Ludewig. Paper. Price, 7 marks, 5 pfennigs. Pp. 130, with 151 illustrations. Berlin: Urban & Schwarzenberg, 1923.
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This monograph intends to present the physical principles on which induction apparatus are built and operated, while special stress is laid on their use in connection with roentgenray apparatus. Particular attention is paid to the theory of the electric oscillations. The author predicts that a full understanding of the peculiarities of these oscillations will eventually make it possible to produce roentgen rays that are regulated at will in their composition. Starting from the fundamentals of electromagnetism, the power field of an electric current, he explains the magnetic circle, the magnetic qualities of the metals, especially of iron, and the various electric currents produced primarily and in the inductors. Then follows a description of the various apparatus used for determining and measuring these electric manifestations. The third chapter is devoted to electric oscillations, and to the open and closed circle of electric vibrations. A short history of the development of the
Die physikalischen Grundlagen des Betriebes von Röntgenröhren mit dem Induktorium.. JAMA. 1923;80(23):1719. doi:10.1001/jama.1923.02640500061038