THE BELL SYSTEM 



TECHNICAL JOURNAL 



VOLUME XIV, 1935 

 Table of Contents 



January, 1935 



Wide Band Transmission Over Balanced Circuits — A . B. Clark . . .1 

 A Survey of Magnetic Materials in Relation to Structure — 



W. C. Ellis and Earle E. Schumacher 8 



Theory of Multi-Electrode Vacuum Tubes — H. A. Pidgeon 44 



Limits to Amplification — /. B. Johnson and F. B. Llewellyn 85 



Vacuum Tubes as High-Frequency Oscillators — 



M. J. Kelly and A. L. Samuel 97 

 Horizontal Rhombic Antennas— 



E. Bruce, A. C. Beck and L. R. Lowry 135 

 Extraneous Frequencies Generated in Air Carrying Intense Sound 



Waves — A. L. Thuras, R. T. Jenkins and II. T. 0' Neil 159 



April, 1935 



Cable Crosstalk — Effect of Non-Uniform Current Distribution in 



the Wires— i?. N. Hunter and R. P. Booth 179 



Experiments with Directivity Steering for Fading Reduction — 



E. Bruce and A. C. Beck 195 



A General Theory of Electric Wave Filters — II. W. Bode 211 



Ideal Wave Filters— 77. W. Bode and R. L. Dietzold 215 



Ultra-Short- Wave Propagation: Mobile Urban Transmission 



Characteristics^ — C. R. Burrows, L. E. Hunt and A. Decino . . 253 

 An Application of Number Theory to the Splicing of Telephone 



Cables— 77. P. Lawther, Jr 273 



Contemporary Advances in Physics, XXIX — The Nucleus, Fourth 



Part— TCar/ K. Darrow 285 



Ferromagnetic Distortion of a Two-Frequency Wave — 



Robert M. Kalb and William R. Bennett 322 



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