Contributors to this Issue 



A. F. Bennett, Western Electric Company, 1914-25; Bell Telephone 

 Laboratories, 1925-. Mr. Bennett, Director of Station Apparatus De- 

 velopment since 1948, is in charge of the development, design, field 

 trials, and studies of telephone instruments and sets, coin collectors, 

 telephone booths, and station systems. During World War II, Mr. 

 Bennett supervised the development and engineering work on a number 

 of ordnance items. For this he was awarded a Presidential Certificate 

 of Merit in 1946. He was a representative of the office of Scientific Re- 

 search and Development and in that capacity served in the United 

 Kingdom in 1943. He is a member of the A.I.E.E., the Acoustical 

 Society of America, and the Physical Society. 



R. W. Burns, B.A., Indiana University, 1916; B.S. in E.E., Purdue 

 University, 1918. U. S. Army, 1918; American Telephone and Telegraph 

 Company, 1919-34; Bell Telephone Laboratories, 1934-. Mr. Burns has 

 been engaged in the formulation of requirements for central office main- 

 tenance equipment, principally that used for testing exchange lines 

 and trunks. During World War II he was in charge of a group preparing 

 instruction books for teletype communication equipment for the armed 

 forces. Professional Engineer, New York State. Member of Sigma XI 

 and Eta Kappa Nu. 



J. W. Dehn, E.E., Polytechnic Institute of Brooklyn, 1932. Western 

 Electric Company, 1919-25; Bell Telephone Laboratories, 1925-. Switch- 

 ing Systems Development Engineer, 1952. Mr. Dehn has been prin- 

 cipally concerned with the design and development of manual and dial 

 telephone switching systems since joining the Bell System. During 

 World War II he developed conmiunication systems for the Signal Corps 

 and trained military personnel in the operation and maintenance of 

 this equipment. Since 1945 he has been engaged in No. 5 crossbar design. 

 Professional Engineer, New York State. 



R. F. Mallina, M.E., Vienna Technical College, 1912. London In- 

 stitute of City and Guilds, 1914. Wurlitzer Piano Company, Acoustical 

 Engineer, 1925. RCA Victor Company, Head of Apparatus Develop- 

 ment Department, 1929. Bell Telephone Laboratories, 1929-. At the 



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