CONTRIBUTORS TO THIS ISSUE 1517 



member of the Switching Apparatus Development Department in which 

 he is supervising a group concerned with static and dynamic behavior of 

 new electromagnets and relays. He is also engaged in investigations of 

 the performance of electrical contacts on telephone relays. 



C. E. Pollard, Jr., Polytechnic Institute of Brooklyn, 1927-1931. 

 Bell Telephone Laboratories, 1925-. Mr. Pollard first worked on voice 

 recording and reproducing equipment and spent some time on the 

 development of telephone carbon microphones before becoming inter- 

 ested in mercury contact relays. In this field he has been concerned with 

 a wide variety of relays, and during World War II concentrated on their 

 application to military projects. He is currently engaged in development 

 work on mercury contact relays. 



John H. Rowen, B.E.E., Ohio State University, 1948; M.S., Ohio 

 State University, 1951. U.S.N.R., maintenance of Air Force radar 

 equipment, 1944-1946; Ohio State University, Research Foundation, 

 Antenna Laboratory, 1948-1951; Bell Telephone Laboratories, 1951-. 

 Concerned with the practical application of fundamental research, he 

 has spent his two years at Bell Laboratories on studies of the microwave 

 behavior of ferrites. While at Ohio State University, Mr. Rowen worked 

 on several methods of measuring the radiation efficiency of small aper- 

 ture antennas. Member of the I.R.E. and Eta Kappa Nu. 



Mark A. Townsend, B.S. in E.E., Texas Technological College, 

 1936; S.M. in E.E., Massachusetts Institute of Technology, 1937. 

 General Electric Company, 1937-1943; Massachusetts Institute of 

 Technology, Radar School, 1943-1945. Bell Telephone Laboratoiies, 

 1945-. Mr. Townsend has been concerned with the basic development of 

 gas-filled tubes. His projects have included work on the voltage reference 

 tube, cold cathode stepping tubes, and the development of tubes for 

 use in transmission and switching. At present Mr. Townsend is in charge 

 of a group responsible for basic development of gas-filled tubes. Member 

 of the A.I.E.E., Tau Beta Pi and Sigma Xi. 



