Contributors to this Issue 



Harald T. Friis, E.E., Royal Technical College, Copenhagen, 1916; 

 Sc.D., 1938; Assistant to Professor P. D. Pedersen, 1916; Technical Advisor 

 at the Royal Gun Factory, Copenhagen, 1917-18; Fellow of the American 

 Scandinavian Foundation, 1919; Columbia University, 1919. Western 

 Electric Company, 1920-25; Bell Telephone Laboratories, 1925-. Formerly 

 as Radio Research Engineer and since January 1946 as Director of Radio 

 Research, Dr. Friis has long been engaged in work concerned with funda- 

 mental radio problems. He is a Fellow of the Institute of Radio Engineers. 



Ray S. Hoyt, B.S. in Electrical Engineering, University of Wisconsin, 

 1905; Massachusetts Institute of Technology, 1906; M.S., Princeton, 1910. 

 American Telephone and Telegraph Company, Engineering Department, 

 1906-07. Western Electric Company, Engineering Department, 1907-11. 

 American Telephone and Telegraph Company, Engineering Department, 

 1911-19; Department of Development and Research, 1919 34. Bell 

 Telephone Laboratories, 1934-. Mr. Hoyt has made contributions to the 

 theory of loaded and non-loaded transmission lines and associated apparatus, 

 theory of crosstalk and other interference, and probability theory with 

 particular regard to applications in telephone transmission engineering. 



W. D. Lewis, A.B. in Communication Engineering, Harvard College, 

 1935; Rhodes Scholar, Wadham College, Oxford; B.A. in Mathematics, 

 Oxford, 1938; Ph.D. in Physics, Harvard, 1941. Bell Telephone Labora- 

 tories, 1941-. Dr. Lewis was engaged in radar antenna work in the Radio 

 Research Department during the war; he is now engaged in microwave 

 repeater systems research. 



J. C. LoziER, A.B. in Physics, Columbia College, 1934; graduate physics 

 student, Princeton University, 1934-35. R.C.A. \'ictor Manufacturing 

 Company, 1935-36; Bell Telephone Laboratories, Inc., 1936-. Mr. Lozier 

 has been engaged in transmission development work, chiefly on radio 

 telephone terminals. During the war he was concerned primarily with 

 the theory and design of servomechanisms. 



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