Contributors to this Issue 



E. N. Gilbert, B.S., Queens College, 1943; Ph.D., Massachusetts 

 Institute of Technology, 1948. M.I.T. Radiation Laboratory, 1944-46. 

 Bell Telephone Laboratories, 1948-. Dr. Gilbert's first assignment was 

 in a group studying information theory, and in 1949 he joined a group 

 concerned with switching theory. Member of the American Mathematical 

 Society. 



I. L. Hopkins, B.S., Massachusetts Institute of Technology, 1927; 

 Bell Telephone Laboratories, 1927-. For eighteen years, Mr. Hopkins 

 designed testing equipment and tested insulating materials. Right after 

 World War II, he tested and developed special-purpose rubber com- 

 pounds, and since 1948 he has been conducting research in the physical 

 properties of polymers. 



W. A. Malthaner, B.E.E., Rensselaer Polytechnic Institute, 1937. 

 Bell Telephone Laboratories, 1937-. Mr. Malthaner is currently engaged 

 in research on new automatic telephone central-office systems, inter- 

 office signaling systems, and subscriber dialing and supervisory arrange- 

 ments. Until World War II, when he worked on the development of 

 automatic fire control systems and fire control radar, Mr. Malthaner 

 tested and developed central office circuits and switching systems. As- 

 sociate of the American Institute of Electrical Engineers. Member of the 

 Institute of Radio Engineers, Tau Beta Pi and Sigma Xi. 



Warren P. Mason, B.S. in E.E., University of Kansas, 1921; M.A., 

 Ph.D., Columbia, 1928. Bell Telephone Laboratories, 1921-. Dr. Ma- 

 son has been engaged in investigating the properties and applications 

 of piezoelectric crystals, in the study of ultrasonics, and in mechanics. 

 Fellow of the American Physical Society, Acoustical Society of America 

 and Institute of Radio Engineers and member of Sigma Xi and Tau 

 Beta Pi. 



Brockway McMillan, B.S., Massachusetts Institute of Technology, 

 1936; Ph.D., Massachusetts Institute of Technology, 1939; Instructor of 

 Mathematics, Massachusetts Institute of Technology, 1936-39; Procter 



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