THE BELL S Y S T E M 



Jechnical ournal 



DEVOTED TO THE SC I E N T I FIC^^^ AND ENGINEERING 

 ASPECTS OF ELECTRICAL COMMUNICATION 



ADVISORY BOARD 



S. Bracken M. J. Kelly 



F. R. Kappel E. J. McNe 



--^Si?? 



EDITORIAL COMMITTEE ^"^^^ UB^J^'s 



W. H. Dohertt, Chairman FFR 1 



A. J. BUSCH R. K. HONAMAN '"^0 



G. D. Edwards F. R. Lack 



R. G. Elliott H, I. Romnes 



J. B. FiSK H. iJ. Schmidt 



E. L Green G.N.Thayer --.-..,. 



EDITORIAL STAFF 



J. D. Tebo, Editor M. E. Strieby, Managing Editor 



R. L. Shepherd, Production Editor 



INDEX 



VOLUME XXXIII 

 1954 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



NEW YORK 



THIS VOLUME IS BOUND IN TWO PARTS 



Part I constitutes pages 1-798 

 Part II constitutes pages 799-1400 



