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3LUME XXXIII MARCH 1954 NUMBER 2 



TraflBc Engineering Techniques for Determining Trunk Require- 

 ments in Alternate Routing Trunk Networks c. j. truitt 277 



Intertoll Trunk Concentrating Equipment d. f, Johnston 303 



The Transistor as a Network Element j. t. bangert 329 



Continuous Incremental Thickness Measurements of Non- 

 Conductive Cable Sheath b, m. wojciechowski 353 



The Application of Designed Experiments to the Card Translator 



c. B. brown and m. e. terry 369 



Wave Propagation Along a Magnetically-Focused Cylindrical 



Electron Beam w. w. rigrod and j. a. lewis 399 



DifiFraction of Plane Radio Waves by a Parabolic Cylinder 



s. o. rice 417 



Abstracts of Bell System Technical Papers Not Published in this 



Journal 505 



Contributors to this Issue 514 



COPYRIGHT 1954 AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



