410 THE BELL SYSTEM TECHNICAL JOURNAL, MARCH 1952 



with rotational assignments in the transmission, switching, and apparatus 

 departments, Mr. Staehler became a member of a switching group 

 concerned with both local and toll signaling. He is working at present on 

 a new voice-frequency toll signaling development. Member of Tau Beta 

 Pi and Eta Kappa Nu. 



M. K. ZiNN, B.S. in E.E., Purdue University, 1918; U. S. Army, 

 1918-19. Amer. Tel. and Tel., 1919-1934; Bell Telephone Laboratories, 

 1934-. As a transmission engineer, Mr. Zinn has been concerned with 

 land and submarine loaded cables, telephone instruments, buried cable 

 and submarine cable with amplifiers and special problems. Member of 

 A. I. E. E. and Tau Beta Pi. 



