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i: 1) I T () K 1 A L C O M M I T T E E 



K. I. (; i; K K > - (1} airman 



A. J. B L! S <; II F. R. T.ACK 



W. H. D O H K H T Y W. H. N U N N 



G. D. E D W A H D S H. I. H O M N E S 



J. B. FISK H. V. SCH M 1 1) T 



11. K. H O N A M A N G.N. T H A V E R 



EDITORIAL STAFF 



J. D. T E B O, Editor 



M. E. S T R I E R Y. Mana^iriir Editor 



R. L. SHE P H E H D, Production Editor 



THE BELL SYSTEM TECHNICAL JOURNAL is published six times 

 a year by the American Telephone and Telegraph Company, 195 Broadway, 

 New York 7, N. Y. Cleo F. Craig, President; S. Whitney Landon, Secretary; 

 Alexander L. Stott, Treasurer. Subscriptions are accepted at $3.00 per year. 

 Single copies are 75 cents each. The foreign postage is 65 cents per year or 11 

 cents per copy. Printed in U. S. A. 



