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!: ': : ;-; ,'^,£;L>;/JirXyir4f technical journal 

 {"r^ri July, 1937 



Scientific Research Applied to the Telephone Transmitter and 



Receiver — Edwin H. Colpitis 251 



The Use of Coaxial and Balanced Transmission Lines in Filters 

 and Wide-Band Transformers for High Radio Frequencies — 



W. P. Mason and R. A. Sykes 275 



A Ladder Network Theorem — John Riordan 303 



Contemporary Advances in Physics, XXXI — Spinning Atoms 



and Spinning Electrons — Karl K. Darrow 319 



A Multiple Unit Steerable Antenna for Short-Wave Reception — 



H. T. Friis and C. B. Feldman 337 



October, 1937 



Resistance Compensated Band-Pass Crystal Filters for Use in 



Unbalanced Circuits— PT. P. Mason 423 



Magnetic Generation of a Group of Harmonics — 



E. Peterson, J. M. Manley and L. R. Wrathall 437 



The Vodas— 5. B. Wright 456 



Radio Telephone Noise Reduction by \'oice Control at Receiver — 



C. C. Taylor 475 

 Transmitted Frequency Range for Circuits in Broad-Band 



Systems—^. A. Affel 487 



The Dielectric Properties of Insulating Materials — 



E. J. Murphy and S. 0. Morgan 493 

 Variable Frequency Electric Circuit Theory with Application to 

 the Theory of Frequency-Modulation — 



John R. Carson and Thornton C. Fry 513 

 Irregularities in Broad-Band Wire Transmission Circuits — 



Pierre Mertz and K. W. Pfleger 541 

 Technical Digests — 



Transoceanic Radio Telephone Development — Ralph Bown. 560 

 A Negative Grid Triode Oscillator and Amplifier for Ultra- 

 High Frequencies — A. L. Samuel 568 



Addendum — 



Radio Propagation over Plane Earth — Field Strength Curves 



— C. R. Burrows 574 



