THE BELL SYSTEM 



TECHNICAL JOURNAL 



VOLUME XI, 1932 

 Table of Contents 



JAINTUARY, 1932 



The Cathode Ray Oscillograph — /. B. Johnson 1 



The Operation of Vacuum Tubes as Class B and Class C Ampli- 

 fiers — C. E. Fay 28 



The Time Factor in Telephone Transmission — O. B. Blackivell ... 53 



Constant Frequency Oscillators — F. B. Llewellyn 67 



Some Physical Properties of Wiping Solders — 



D. A. McLean, R. L. Peck, Jr., and E. E. Schumacher 101 



Regeneration Theory — H. Nyquist 126 



Contemporary Advances in Physics, XXIIT — Data and Nature of 



Cosmic Rays — Karl K. Darroxv 143 



April, 1932 



A New Key West-Havana Carrier Telephone Cable — 



H. A. Affel, W. S. Gorton and R. IV. Chesnut 197 

 Cellulose Acetate Treatment for Textile Insulation — Engineering 



Development — E. B. Wood and D. R. Brob.<;i 213 



Cellulose Acetate Treatment for Textile Insulation — Development 



of the Manufacturing Process — C. R. Avery and H. Kress ... 231 

 The Development of a Handset for Telephone Stations — 



W. C. Jones and A. H. Inglis 245 

 Precision Methods Used in Constructing Electric Wave Filters for 



Carrier Systems — G. R. Harris 264 



Cathode Sputtering— A Commercial Application— /:/■«/ F. Fruth . . 283 

 A Voice and Ear for Telephone Measurements — 



A. H. Inglis, C. H. G. Gray and R. T. Jenkins 293 

 3 



