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ND ENGINEERING 



.SPECTS OF ELECTRICAL COMMUNICATION 



OLUME XXXIII 



JULY 19 54 



NUMBER 4 



KANSAS CIJY, MO. 



Negative Resistance Arising from Tr^4illl-.^Me imS6ni^^¥uctor 



Diodes w, shockley 799 



JtiL -7 i^;>4 

 Transistor and Junction Diodes in Telepnohe I*bwerTP'Iants 



F. H. CHASE, B. H. HAMILTON AND D, H. SMITH 827 



Wire Straightening and Molding for Wire Spring Relays 



A. J. BRUNNER, ^. E. COSSON AND R. W. STRICKLAND 859 



Some Fundamental Problems in Percussive Welding e. e. stjmner 885 



Automatic Contact Welding in Wire Spring Relay Manufacture 



A. L. quinlan 897 



Electronic Relay Tester 



T. E. DAVIS AND A. L. BLAHA 925 



Topics in Guided Wave Propagation Through Gyromagnetic Media 

 Part II — Transverse Magnetization and Non-Reciprocal Helix 



H. SUHL AND L. R. WALKER 939 



Theoretical Fundamentals of Pulse Transmission — II 



E. D. SUNDE 987 



Bell System Technical Papers Not Published in this Journal 1011 



I Recent Bell System Monographs 1017 



Contributors to this Issue 1019 



COPTRIGHT 1954 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



