HE BELL SYSTEM 



Jechnical ournal 



VOTED TO THE SC I E N T I FIC^W'^ AND ENGINEERING 

 PECTS OF ELECTRICAL COMMUNICATION 



LUME XXXIII MAY 1954 N;UMBER3 



P-N-I-P and N-P-I-N Junction Transistor Triodes J. m. early 517 



Arcing of Electrical Contacts in Telephone Switching Circuits. 

 Part III — Discharge Phenomena on Break of Inductive 



Circuits M. M. ATALLA 535 



Thickness Measurement and Control in the Manufacture of Poly- 

 ethylene Cable Sheath w. t. eppler 559 



Topics in Guided-Wave Propagation Through Gyromagnetic Media 

 Part I — The Completely Filled Cylindrical Guide 



H. SUHL AND L. R. WALKER 579 



Coupled Wave Theory and Waveguide Applications s. e. miller 661 

 Theoretical Fundamentals of Pulse Transmission — I e. d. sunde 721 



Bell System Technical Papers Not Published in this Journal 789 



Contributors to this Issue 797 



COPYRIGHT 1954 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



