Contributors to this Issue 



Alfred C. Beck, E.E., Rensselaer Polytechnic Institute, 1927. 

 Test Department, New York Edison Company, summers 1926-27. 

 Instructor in mathematics, Rensselaer Polytechnic Institute, 1927-28. 

 Member, Technical Staff, Bell Telephone Laboratories, 1928-. 



Edmond Bruce, B.S., Massachusetts Institute of Technology, 1924. 

 Radio service, U. S. Navy, 1917-19. Western Electric Company, 

 1924-25; Bell Telephone Laboratories, 1925-. Mr. Bruce has been 

 engaged in the development of short-wave radio receivers and field- 

 strength measuring equipment, and has specialized in directive antenna 

 systems for short-wave radio communication. He was awarded the 

 Morris Liebmann Memorial Prize by the Institute of Radio Engineers 

 in 1932. 



A. B. Clark, B.E.E., University of Michigan, 1911. American 

 Telephone and Telegraph Company, 1911-34; Toll Transmission 

 Development Engineer, 1928-34. Bell Telephone Laboratories, 

 1934-. As Toll Transmission Development Director, Mr. Clark is 

 engaged in work largely concerned with toll telephone and telegraph 

 systems. 



W. C. Ellis, Ch.E., Rensselaer Polytechnic Institute, 1924; Ph.D., 

 1927. Bell Telephone Laboratories, 1927-. Dr. Ellis has been en- 

 gaged in metallurgical studies on magnetic materials and copper alloys. 



R. T. Jenkins, B.S., in Electrical Engineering, Cooper Union, 1917; 

 E.E., 1920. Engineering Department, Western Electric Company, 

 1916-25; Research Department, Bell Telephone Laboratories, 1925-. 

 Mr. Jenkins' work has been largely in connection with transmission 

 testing methods and apparatus, and with electro-acoustic calibrations. 



J. B. Johnson, B.S.. University of North Dakota, 1913; M.S., 

 University of North Dakota, 1914; Ph.D., Yale, 1917. Engineering 

 Department, Western Electric Company, 1917-25; Bell Telephone 

 Laboratories, 1925-. As Research Physicist, Dr. Johnson has been 

 engaged in the development and application of special vacuum tubes 

 and gaseous discharge devices. 



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