Contributors to this Issue 



Charles B. Aiken, B.S., Tulane University, 1923; M.S. in Electrical 

 Communication Engineering, Harvard University, 1924; M.A. in 

 Physics, 1925. Bell Telephone Laboratories, 1928-. Mr. Aiken has 

 been engaged on work in connection with aircraft communication and 

 more recently with the design of broadcast radio receiver equipment. 



F. E. Haworth, A.B., University of Oregon, 1924; M.A., Columbia 

 University, 1929 ; Bell Telephone Laboratories, 1925-. Mr. Haworth's 

 work has been in crystal analysis by means of X-rays, magnetic mate- 

 rials, and more recently in studies of dielectrics. 



Herbert E. Ives, B.S., University of Pennsylvania, 1905; Ph.D., 

 Johns Hopkins, 1908; assistant and assistant physicist. Bureau of 

 Standards, 1908-09; physicist, Nela Research Laboratory, Cleveland, 

 1909-12; physicist. United Gas Improvement Company, Philadelphia, 

 1912-18; U. S. Army Air Service, 1918-19; research engineer, Western 

 Electric Company and Bell Telephone Laboratories, 1919 to date. 

 Dr. Ives' work has had to do principally with the production, measure- 

 ment and utilization of light. 



W. C. Jones, B.S. in E.E., Colorado College, 1913; Western Elec- 

 tric Company, 1913-25; Bell Telephone Laboratories, 1925-. As 

 Transmission Instruments Development Engineer, Mr. Jones has 

 specialized in the development and application of instruments for the 

 transmission of speech and music. 



A. R. Kemp, B.S., California Institute of Technology, 1917, M.S., 

 1918; Engineering Department, Western Electric Company, 1918-25; 

 Bell Telephone Laboratories, 1925-. Mr. Kemp has been engaged in 

 chemical research on rubber and allied materials used for submarine 

 and other types of insulation. 



W. H. Martin, A.B., Johns Hopkins University, 1909; B.S., Mas- 

 sachusetts Institute of Technology, 1911; American Telephone and 

 Telegraph Company, Engineering Department, 1911-19; Department 

 of Development and Research, 1919-. As Local Transmission En- 

 gineer, Mr. Martin has been engaged in development work on the 

 transmission of telephone sets and local exchange circuits, transmission 

 quality and loading. 



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