VOLUME XXIV APRIL, 1945 NUMBER 2 



THE BELL SYSTEM ^m.^^ 



TECHNICAL JOURNAL 



DEVOTED TO THE SCIENTIFIC AND ENGINEERING ASPECTS 

 OF ELECTRICAL COMMUNICATION 



Piezoelectric Crystals in Oscillator Circuits . . I.E. Fair 161 



The Measurement of the Performance Index of Quartz 

 Plates C. W. Harrison 217 



Lightning Protection of Buried Toll Cable . E. D. Sunde 253 



Abstracts of Technical Articles by Bell System Authors 301 



Contributors to this Issue 303 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



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