Contributors to this Issue 



John Bardeen, University of Wisconsin, B.S. in E.E., 1928; M.S., 1930. 

 (iulf ResearchandDevelopmentCorporation, 1930-33; Princeton University, 

 1933-35, Pli.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. 



A. E. BowEN, Ph.B., Yale University, 1921; Graduate School, Yale Uni- 

 versity, 1921-24. American Telephone and Telegraph Company, Depart- 

 ment of Development and Research, 1924-34. Bell Telephone Laboratories, 

 1934-42. U. S. Army Air Force, 1942-45. Bell Telephone Laboratories, 

 1945-48. With the American Telephone and Telegraph Company, Mr. 

 Bowen's work was concerned principally with the inductive coordination of 

 power and communications systems. From 1934 to 1942 he was engaged in 

 work in the ultra-high-frequency field, particularly on hollow waveguides. 

 He became a Major and later a Colonel while serving with the U. S. Army 

 Air Force from 1942 to 1945 on a special mission to Trinidad and subse- 

 quently in the Pentagon. After returning to Bell Telephone Laboratories in 

 1945 he was engaged in the problems of microwave repeater research until 

 his death in 1948. 



M. E. HiNES, B.S. in Applied Physics, California Institute of Technology, 

 1940; B.S. in Meteorology, 1941; M.S. in Electrical Engineering, 1946. 

 U. S. Air Force Weather Service, 1941-45. Bell Telephone Laboratories, 

 1946-. Mr. Hines has been engaged in the development of vacuum tubes. 



Jack A. Morton, B.S. in Electrical Engineering, Wayne University, 

 1935; M.S.E., University of Michigan, 1936. Bell Telephone Laboratories, 

 1936-. Mr. Morton joined the Laboratories to work on coaxial cable and 

 microwave amplifier circuit research; during the war he was at first a member 

 of a group engaged in improving the signal-to-noise performance of radar 

 receivers. In 1943 he transferred to the Electronic Development Department 

 to work on microwave tubes for radar and radio relay. Since 1948 he has 

 been Electronic Apparatus Development Engineer responsible for the de- 

 velopment of transistors and other semiconductor devices. 



William W. Mumford, B.A., Willamette University, 1930. Bell Tele- 

 phone Laboratories, 1930-. Mr. Mumford has been engaged in work that is 

 chiefly concerned with ultra-short-wave and microwave radio communica- 

 tion. 



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