Contributors to This Issue 



John Bardeex, University of Wisconsin, B.S. in E.E., 1928; M.S., 

 1930. Gulf Research and Development Corporation, 1930-33; Princeton 

 University, 1933-35, Ph.D. in Math. Phys., 1936; Junior Fellow, Society 

 of Fellows, Harvard University, 1935-38; Assistant Professor of Physics, 

 University of Minnesota, 1938-41; Prin. Phys., Naval Ordnance Labora- 

 tory, 1941-45. Bell Telephone Laboratories, 1945-. Dr. Bardeen is en- 

 gaged in theoretical problems related to semiconductors. 



\V. R. Benxett, B.S., Oregon State College, 1925; A.M., Columbia 

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

 been active in the design and testmg of multichannel communication sys- 

 tems, particularly with regard to modulation processes and the effects of 

 nonlinear distortion. He is now engaged in research on various transmis- 

 sion problems. 



C. B. Feldman, University of Minnesota, B.S. in Electrical Engineering, 

 1926; M.S., 1928. Bell Telephone Laboratories, 1928-. As Transmission 

 Research Engineer, Mr. Feldman has charge of a group studying new trans- 

 mission methods. He is a Fellow of the Institute of Radio Engineers. 



J. R. Hayxes, B.S. in Physics, University of Kentucky, 1930. Bell 

 Telephone Laboratories, 1930-. Mr. Haynes is in the Physical Research 

 Department, engaged in solid state studies. 



CoNYERS Herring, A.B., University of Kansas, 1933; Ph.D., Princeton 

 University, 1937; National Research Fellow, Massachusetts Institute of 

 Technolog>% 1937-39; Instructor in Mathematics and Research Associate 

 in Mathematical Physics, Princeton University, 1939-40; Instructor in 

 Physics, University of Missouri, 1940-41; Columbia University Division of 

 War Research, 1941-45; Professor of Applied Mathematics, University of 

 Texas, 1946. Bell Telephone Laboratories, 1945-. Dr. Herrmg has been 

 engaged in theoretical problems in the tields of solid state physics and elec- 

 tron emission. 



R. J. KiRCHER, B.S. in E.E., California Institute of Technology, 1929; 

 M.S., Stevens Institute of Technology, 1941 . Bell Telephone Laboratories, 



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