iv .. 



; e:ei:l\systs:m Technical journal 



PerfoFfnance Chapicjte.ri;^'f.i<r,?'of •Va.rious Carrier Telegraph Methods — 

 .' 2^ ArJ^'ones-ahdk'.'W-'Pjl'e'^er.'- 483 



October, 1946 



A Study of the Delays Encountered by Toll Operators in Obtaining 



an Idle Trunk — S. C. Rappleye 539 



Spark Gap Switches for Radar — F. S. Goucher, J. R. Haynes, W. A. 



Depp and E. J. Ryder 563 



Coil Pulsers for Radar — E. Peterson 603 



Linear Servo Theory — Robert ■£. Graham 616 



