Contributors to this Issue 



M. M. Atalla, B.S., Caiio University, 1945; M.S., Purdue University, 

 1947; Ph.D., Purdue University, 1949; Studies at Purdue undertaken 

 as the result of a scholarship from Cairo University for four years of 

 graduate work. Bell Telephone Laboratories, 1950-. For the past three 

 years he has been a member of the Switching Apparatus Development 

 Department, in which he is supervising a group doing fundamental 

 research work on contact physics and engineering. Current projects 

 include fundamental studies of gas discharge phenomena between con- 

 tacts, their mechanisms, and their physical effects on contact behavior; 

 also fundamental studies of contact opens and resistance. In 1950, an 

 article by him was awarded first prize in the junior member category of 

 the A.S.M.E. He is a member of Sigma Xi, Sigma Pi Sigma, and Pi Tau 

 Sigma, and a junior member of the A.S.M.E. 



Frank E. Blount, B.S. in E.E., Oregon State College, 1928. Bell 

 Telephone Laboratories 1928-. Mr. Blount tested panel system circuits 

 for a year and then transferred to development work on special 

 switching and signaling circuits. His interest in circuit design has 

 also included circuits for automatic toll ticketing for the step-by-step 

 system, for radar testing, and more recently for No. 5 crossbar system. 

 Member of Tau Beta Pi, Eta Kappa Nu and Phi Kappa Phi. 



J. T. Lindsay Brown, B.S. College of the City of New York, 1915. 

 Western Electric Company, 1915-1925. Bell Telephone Laboratories 

 1925-. For twenty-five years Mr. Brown was concerned with the develop- 

 ment and testing of telephone instruments and such allied apparatus as 

 loudspeakers, microphones, and earphones. In 1940 he transferred to 

 work on the development of glass sealed magnetic switches. He is cur- 

 rently in charge of a group developing mercury contact relays. Member 

 of the A.I.E.E., I.R.E. and Acoustical Society of America. 



Wallace A. Depp, B.S. and M.S. in E.E., University of Illinois, 1936 

 and 1937. Bell Telephone Laboratories, 1937-. In his early laboratories 



1515 



