Contributors to This Issue 



Joseph A. Becker,. A. B., Cornell University 1918; PhD., Cornell Univer- 

 sity, 1922. National Research Fellow, California Institute of Technology, 

 1922-24; Asst. Prof, of Physics, Stanford University, 1924. Engineering 

 Dept., Western Electric Company, 1924-1925; Bell Telephone Laboratores, 

 1925-. Mr. Becker has worked in the fields of X-Rays, magnetism, thermio- 

 nic emission and adsorption, particularly in oxide coated filaments, the 

 properties of semiconductors, as applied in varistors and thermistors. 



W. R. Bennett, B. S., Oregon State College, 1925; A.M., Columbia 

 University, 1928. Bell Telephone Laboratories, 1925-. Mr. Bennett 

 has been active in the design and testing of multichannel communication 

 systems, particularly with regard to modulation processes and the effects 

 of nonlinear distortion. As a member of the Transmission Research De- 

 partment, he is now engaged in the study of pulse modulation techniques 

 for sending telephone channels by microwave radio relay. 



C. B. Green, Ohio State University, B.A. 1927; M.A. in Physics, 1928. 

 Additional graduate work at Columbia University. Bell Telephone Lab- 

 oratories, 1928-. For ten years Mr. Green was concerned with trans- 

 mission development for telephotography and television systems and with 

 the design of vacuum tubes. Since 1938 he has been engaged in the developl- 

 ment and application of thermistors. 



J. P. Kinzer, M. E., Stevens Institute of Technology, 1925. B.C.E., 

 Brooklyn Polytechnic Institute, 1933. Bell Telephone Laboratories, 1925-. 

 Mr. Kinzer's work has been in the development of carrier telephone repeat- 

 ers; during the war his attention was directed to investigation of the mathe- 

 matical problems involved in cavity resonators. 



W. P. Mason, B.S. in E.E., Univ. of Kansas, 1921; M.A., Ph.D., Co- 

 lumbia, 1928. Bell Telephone Laboratories, 1921-. Dr. Mason has been 

 engaged principally in investigating the properties and applications of 

 piezoelectric crystals and in the study of ultrasonics. 



R. S. Ohl, B. S. in Electro-Chemical Engineering, Pennsylvania State 

 College, 1918; U. S. Army, 1918 (2nd Lieutenant, Signal Corps); Vacuum 

 tube development, Westinghouse Lamp Company, 1919-21; Instructor in 



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