600 BELL SYSTEM TECHNICAL JOURNAL 



1929-. Mr. Kircher was engaged in radar and counter measures projects 

 during the war. Electronic Apparatus Development Department since 

 1944. Transistor Development Group since 1948. 



G. L. Pearson, A.B., Willamette University, 1926; M.A. in Physics, 

 Stanford University, 1929. Bell Telephone Laboratories, 1929-. Mr. Pear- 

 son is in the Physical Research Department where he has been engaged in 

 the study of noise in electric circuits and the properties of electronic semi- 

 conductors. 



Robert M. Ryder, Yale University, B.S. in Physics, 1937; Ph.D., 1940. 

 Bell Telephone Laboratories, 1940-. Dr. Ryder joined the Laboratories to 

 work on microwave amplifier circuits, and during most of the war was a 

 member of a group engaged in studying the signal-to-noise performance 

 of radars. In 1945 he transferred to the Electronic Development Depart- 

 ment to work on microwave oscillator and amplifier tubes for radar and radio 

 relay applications. He is now in a group engaged in the development of 

 transistors. 



W. Shockley, B.Sc, California Institute of Technology, 1932;. Ph.D., 

 Massachusetts Institute of Technology, 1936. Bell Telephone Laboratories, 

 1936-. Dr. Shockley's work in the Laboratories has been concerned with 

 problems in solid state physics. 



