Contributors to This Issue 



A. P. Brogle, Jr., S.B. and S.M. in Electrical Engineering, Massachu- 

 setts Institute of Technology, 1949; Signal Corps, U. S. Army, 1942-46; 

 Bell Telephone Laboratories, 1948. While at the Bell Telephone Labora- 

 tories, Mr. Brogle worked on the development of high-frequency networks 

 as part of the M.I.T. Cooperative Course in Electrical Engineering. He is 

 now engaged in Facsimile development at the Signal Corps Engineering 

 Laboratories, Red Bank, New Jersey. 



F. R. Dennis, State College of Washington, B.S. in E.E., 1929. Bell 

 Telephone Laboratories, 1929-. Mr. Dennis has been engaged in the design 

 of electronic measuring apparatus, particularly of the type providing visual 

 display of transmission characteristics. During the war he was engaged in 

 Application Engineering of Airborne Magnetometers in this country and 

 overseas. 



E. P. Felch, Dartmouth College, A.B. in Physics, 1929. Bell Telephone 

 Laboratories, 1929-. Mr. Felch has been concerned with the development 

 of electronic measuring apparatus. During the war he was engaged in the 

 development of Airborne Magnetometers and other magnetic detectors. 



WiLLLAM 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. 



Sloan D. Robertson, B.E.E., University of Dayton, 1936; M.Sc, Ohio 

 State University, 1938, Ph.D., 1941; Instructor of Electrical Engineering, 

 University of Dayton, 1940. Bell Telephone Laboratories, 1940-. Dr. Rob- 

 ertson was engaged in microwave radar work in the Radio Research De- 

 partment during the war. He is now engaged in fundamental microwave 

 radio research. 



Claude E. Shannon, B.S. in Electrical Engineering, University of Michi- 

 gan, 1936; S.M. in Electrical Engineering and Ph.D. in Mathematics, 

 M.I.T., 1940. National Research Fellow, 1940. Bell Telephone Labora- 

 tories, 1941-. Dr. Shannon has been engaged in mathematical research 

 principally in the use of Boolean Algebra in switching, the theory of com- 

 munication, and cryptography. 



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