VOLUME xrx JULY, 1940 



NUMBER 3 



THE BELL SYSTEM 



TECHNICAL JOURNAL 



DEVOTED TO THE SCIENTinC AND ENGINEERING ASPECTS 

 OF ELECTRICAL COMMUNICATION 



Crosstalk in Coaxial Cables — ^Analysis Based on Short-Circuited 

 and Open Tertiaries — K. E. Gould 341 



Crosstalk Between Coaxial Conductors in Cable 



— R. P. Booth and T. M. Odarenko 358 



Compressed Powdered Molybdenum Permalloy for High 



Quality Inductance Coils — V. E. Legg and F. J. Given . 385 



High Accuracy Heterodyne Oscillators — T. Slonczewski . . 407 



Relations Between Attenuation and Phase in Feedback Ampli- 

 fier Design—^. W. Bode 421 



Analysis of the Ionosphere — Karl K. Darrow 455 



Abstracts of Technical Papers 489 



Contributors to this Issue 492 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



NEW YORK 



50c per Copy $1.50 per Year 



