[HE BELL SYSTEM 



Jechnical journal 



fIvOTED TO THE SC I E N T I FIC^W^ AND ENGINEERING 



[PECTS OF ELECTRICAL COMMUNICATION 



KANSAS C"^ MO' 



t*M— IM I III I 



(ILUME XXXV MAY 1956 NUMBERS 



Chemical Interactions Among Defects in Germanium and Silicon 



H. REISS, C. S. FULLER AND F. J. MORIN 535 



Single Crystals of Exceptional Perfection and Uniformity by Zone 

 Leveling D. c, bennett and b, sawyer 637 



Diffused p-n Junction Silicon Rectifiers M. b. prince 661 



The Forward Characteristic of the PIN Diode d. a. kleinman 685 



A Laboratory Model Magnetic Drum Translator for Toll Switch- 

 ing Offices F. J. buhrendorf, h. a. henning and o. j. murphy 707 



Tables of Phase of a Semi-Infinite Unit Attenuation Slope 



D. E. THOMAS 747 



Bell System Technical Papers Not Published in This Journal 751 



Recent Bell System Monographs 759 



Contributors to This Issue 762 



COPYRIGHT 195< AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



