THE BELL SYSTEM 



TECHNICAL JOURNAL 



A JOURNAL DEVOTED TO THE 



SCIENTIFIC AND ENGINEERING 



ASPECTS OF ELECTRICAL 



COMMUNICATION 



EDITORIAL BOARD 



j. J. Caktv Bancroft Gherardi F. B. Jewett 



v.. P.. Craft L. F. Morehouse O. B. Blackwell 



H. P. Charlesworth E. H. Colpitts H. D. Arnold 



R. W. King— Editor 



VOLUME III 

 1924 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 

 NEW YORK 



