CONTRIBUTORS TO THIS ISSUE 989 



tories. His work at the Laboratories has been concerned with general 

 electromagnetic problems, especially regarding waveguide applications, 

 and with analysis of microwave ferrite devices. Dr. Seidel is a member 

 of Sigma Xi and the I.R.E. 



S. Weisbaum, B.A., M.S. and Ph.D., New York University, 1947, 

 1948 and 1953; instructor in physics, New York University, 1950-53; 

 Bell Telephone Laboratories, 1953-. Since joining the Laboratories, Dr. 

 Weisbaum has specialized in the development of microwave ferrite de- 

 vices, such as isolators and circulators. He is a member of the American 

 Physical Society and Sigma Xi. 



