Contributors to this Issue 



Wallace C. Babcock, A.B., Harvard University, 1919; S.B., Harvard 

 University, 1922. U. S. Army, 1917-19. American Telephone and Tele- 

 graph Company, 1922-34; Bell Telephone Laboratories, 1934-. Mr. 

 Babcock was engaged in crosstalk studies until World War II, when he 

 studied radio count ermeasure problems for the N.D.R.C. Since then he 

 has been concerned with antenna development for mobile radio and 

 point-to-point radio telephone systems and has been engaged in other 

 systems studies. Member of I.R.E. and Harvard Engineering Society. 



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

 in E.E., University of Wisconsin, 1929; Ph.D., Princeton University, 

 1936. Gulf Research and Development Company, 1930-33; Harvard 

 University, 1935-38; University of Minnesota, 1938-41 ; Naval Ordnance 

 Laboratory, 1941-45; Bell Telephone Laboratories, 1945-51; University 

 of Illinois, 1951-. At Bell Telephone Laboratories, Dr. Bardeen, co-in- 

 ventor with Dr. Walter Brattain of the point-contact transistor, was 

 primarily concerned with theoretical problems in solid state physics, in- 

 cluding the study of semi-conductors, diffusion in solids, and supercon- 

 ductivity. Associate editor of The Physical Review, 1949-51. Stuart Bal- 

 lantine Medal of the Frankhn Institute, 1952. Fellow, American Physical 

 Society; member, American Association for the Advancement of Science. 



Walter H. Brattain, B.S., Whitman College, 1924; M.A., University 

 of Oregon, 1926; Ph.D., University of Minnesota, 1929. Bureau of 

 Standards, 1928-29; Bell Telephone Laboratories, 1929-. Dr. Brattain, 

 co-inventor with Dr. John Bardeen of the point-contract transistor, has 

 been primarily concerned with the study of semi-conductors at Bell 

 Laboratories. During World War II he worked for the Division of War 

 Research of Columbia University and is currently spending the fall term 

 of the academic year 1952-53 as a visiting lecturer at Harvard Uni- 

 versity. Stuart Ballantine Medal of the Franklin Institute, 1952. Fellow, 

 American Physical Society and American Association for the Advance- 

 ment of Science; member, Sigma Xi and Phi Beta Kappa. 



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