THE BELL SYSTEM 



meal lournal 



DEVOTED TO THE SCIENTIFIC ^W^ AND ENGINEERING 

 ASPECTS OF ELECTRICAL COMMUNICATION 



i^OLUME XXXI NOVEMBER 1952 NUMBER 6 



-^5> 





A New General Purpose Relay for Telephone Switching Systems 



AETHTJK C. KELLER 1023 



Comparison of Mobile Radio Transmission at 150, 450, 900 and 



3700 Mc W. RE A YOUNG, JR. 1068 



Common Control Telephone Switching Systems oscar myers 1086 



Mathematical Theory of Laminated Transmission Lines — Part II 



SAMUEL p. MORGAN, JR. 1121 



Transistors in Switching Circuits a. eugene anderson 1207 



Abstracts of Bell System Papers Not Published in this Journal 1250 

 Contributors to this Issue 1256 



COPYRIGHT 1952 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



