Contributors to This Issue 



Dietrich A. Alsberg, Technical College of Stuttgart, 1938; Case School 

 of Applied Science, postgraduate in electrical engineering, 1939-40. From 

 1940-43 Mr. Alsberg was engaged as development engineer by several 

 organizations. From 1943-45 he served in the U. S. Army Ordnance 

 Department at Aberdeen Proving Ground and in the European Theater. 

 In 1945 he joined the Bell Telephone Laboratories where he is concerned 

 with phase and transmission measurement problems. 



John Bardeen, University of Wisconsin, B.S. in E.E., 1929, M.S., 1930; 

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

 versity, 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 Laboratory, 

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

 in theoretical problems related to semiconductors. 



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 eflfects 

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

 mission problems. 



Walter H. Br.4ttain, B.S., Whitman College, 1924; M.A., University 

 of Oregon, 1926; Ph.D., University of Minnesota, 1929; Major Phys., 

 Bureau of Standards, 1928-29. Bell Telephone Laboratories, 1929-42. 

 Columbia University, N.D.R.C, 1942-44. Bell Telephone Laboratories, 

 1944-. Dr. Brattain is engaged in the study of semiconductors. 



C. H. Dagnall, S.B., Massachusetts Institute of Technology, 1918; 

 S.B., Harvard University, 1918; M.S., Cornell University, 1922. Signal 

 Corps, U.S.A., 1918; General Electric Company, 1919; Instructor in Elec- 

 trical Engineering, Cornell University, 1919-25. Bell Telephone Labora- 

 tories, 1925-. Mr. Dagnall has been chiefly concerned with the design of 

 transmission networks. 



F. S. Farkas, E. E., 1929, Polytechnic Institute of Brooklyn. Engineer- 



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