THE BELL SYSTEM 



TECHNICAL JOURNAL 



A JOURNAL DEVOTED TO THE 



SCIENTIFIC AND ENGINEERING 



ASPECTS OF ELECTRICAL 



COMMUNICATION 



EDITORS 



R. W. King 



J. O. Perrine 



F. B. Jewett 

 O. E. Buckley 

 S. Bracken 



EDITORIAL BOARD 



M. R. Sullivan 

 A. B. Clark 

 M. J. Kelly 



O. B. Blackwell 

 H. S. Osborne 

 F. A. Cowan 



TABLE OF CONTENTS 



AND 



INDEX 



VOLUMES XXI-XXII 

 1941-1943 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



NEW YORK 



