Contributors to This Issue 



Armand 0. Adam,* New York Telephone Company, 1917-1920; West- 

 ern Electric Company, 1920-24; Bell Telephone Laboratories; 1925-. 

 Mr. Adam tested local dial switching systems before turning to design 



j on the No. 1 and toll crossbar systems. From 1942 to 1945 he was as- 

 sociated with the Bell Laboratories School For War Training. Since 

 then he has been concerned with the design and development of the 

 marker for the No. 5 crossbar system. Currently he is supervising a group 



I doing common control circuit development work for the crossbar tandem 



I switching system. 



i Wallace C. Babcock, A.B., Harvard University, 1919; S.B., Harvard 

 University, 1922. U.S. Army, 1917-1919. American Telephone and Tele- 



i graph Company, 1922-1934; Bell Telephone Laboratories, 1934-. Mr. 

 Babcock was engaged in crosstalk studies until World War IL Afterward 



, he was concerned with radio countermeasure problems for the N.D.R.C. 



' Since then he has been working on antenna development for mobile 

 radio and point-to-point radio telephone systems and military projects. 



I Member of I.R.E. and Harvard Engineering Society, 



, Franklin H. Blecher, B.E.E., 1949, M.E.E., 1950 and D.E.E., 

 , 1955, Brooklyn Polytechnic Institute; Polytechnic Research and De- 

 ' velopment Company, June, 1950 to July, 1952; Bell Telephone Labora- 

 I tories 1952-. Dr. Blecher has been engaged in transistor network de- 

 I velopment. His principal interest has been the application of junction 

 [ transistors to feedback amplifiers used in analog and digital computers. 



He is a member of Tau Beta Pi, Eta Kappa Nu and Sigma Xi and is an 



associate member of the I.R.E. 



W. E. Danielson, B.S., 1949, M.S., 1950, Ph.D, 1952, California 



Institute of Technology; Bell Laboratories 1952-. Dr. Danielson has been 



j engaged in microwave noise studies with application to traveling-wave 



[ tubes and he has been in charge of development of traveling-wave tubes 



* Inadvertently, Mr. Adam's biography was omitted from the January issue of 

 the Journal in which his article, "Crossbar Tandem as a Long Distance Switch- 

 ing Equipment," appeared. 



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