Contributors to this Issue 



W. R. Bennett, B.S., Oregon State College, 1925; A.M., Columbia Uni- 

 versity, 1928. Bell Telephone Laboratories, 1925-. Mr. Bennett has been 

 active in the design and testing of multichannel communication systems, 

 particularly with regard to modulation processes and the effects of nonlinear 

 distortion. As a member of the Transmission Research Department, he is 

 now engaged in the study of pulse modulation techniques for sending tele- 

 phone channels by microwave radio relay. 



H. T. BuDENBOM, B.S.E.E., 1922 and E.E., 1928, Purdue University; 

 part time postgraduate work at Columbia and New York Universities. 

 Western Electric Company, Engineering Department, and Bell Telephone 

 Laboratories since 1922. Wire transmission problems, radio interference 

 studies, point-to-point communication facilities and aviation radio develop- 

 ment until 1933. Since 1933 Mr. Budenbom's development work has been 

 primarily on classified projects, which have included radio direction finder 

 and various types of radars. His present activities remain primarily in the 

 field of classified military electronics. 



Charles Clos, C.E., New York University, 1927. New York Telephone 

 Company, plant extension engineering, valuation and depreciation matters, 

 intercompany settlements and tandem and tool fundamental plans, 1927-47. 

 Pratt Institute, Evening School, Mathematics Instructor, 1946-48. Bell 

 Telephone Laboratories, studies on development planning for local and toll 

 switching systems, 1947-. 



Warren A. Marrison, B.Sc. in Physics, Queen's University, Kingston, 

 Canada, 1920; M.A. in Mathematics and Physcis, Harvard University, 1921. 

 Engineering Department, Western Electric Company, 1921-25; Bell Tele- 

 phone Laboratories, 1925-. Mr. Marrison's work has consisted largely of 

 the development and applications of precise standards of frequency. 



S. A. Schelkunoff, B.A., M.A. in Mathematics, The State College of 

 Washington, 1923; Ph.D. in Mathematics, Columbia University, 1928. En- 

 gineering Department, Western Electric Company, 1923-25; Bell Telephone 

 Laboratories, 1925-26. Department of Mathematics, State College of 



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