VOLUME XXV APRIL, 1946 no. 2 



THE BELL SYSTEM 



TECHNICAL JOURNAL 



DEVOTED TO THE SCIENTIFIC AND ENGINEERING ASPECTS 

 OF ELECTRICAL COMMUNICATION 



.\ 



The Magnetron as a Generator of Centimeter Waves. 



Developments at the Bell Telephone Laboratories, 

 1940-1945 



7. B, Fisk, H. D. Hagstrum and P, L, Hartman 167 



Contributors to this Issue 349 



AMERICAN TELEPHONE AND TELEGRAPH COMPANY 



NEW YORK 



$1.00 this copy $1.50 per Year 



