Contributors to this Issue 



M. J. Aykroyd, B,S. in Civil Engineering, Queen's University, 1913. 

 Bitulithic and Contracting Company, Edmonton, 1913-14; Depart- 

 ment of Public Works, Ottawa, 1915-16; Imperial Ministry of Muni- 

 tions, Montreal and New York, 1916-18; Manager and Director, 

 Export and Import Company, Montreal and London, England, 

 1919-23. Bell Telephone Company of Canada, Plant Department, 

 Montreal and Toronto, 1923-34; Outside Plant Engineer, Bell Tele- 

 phone Company of Canada, Toronto, 1934r-. 



D. G. Geiger, Queen's University: B.S. in Electrical Engineering, 

 1922; B.S. in Mechanical Engineering, 1923; Department of Electrical 

 Engineering, 1923-24. Bell Telephone Company of Canada, Montreal, 

 Transmission Division of General Engineering Department, 1924r-26 

 and 1928-29. Lecturer in Electrical Engineering, Queen's University, 

 1926-28. Transmission Engineer, Bell Telephone Company of 

 Canada, Toronto, 1930-. 



Eginhard Dietze, B.S. in Electrical Engineering, University of 

 Michigan, 1917. American Telephone and Telegraph Company, 

 1917-34; Bell Telephone Laboratories, 1934-. Mr. Dietze has been 

 engaged in transmission studies of telephone stations, including room 

 noise conditions at telephone locations. He is co-author of "Indi- 

 cating Meter for Measurement and Analysis of Noise." 



Walter D. Goodale, Jr., E.E., Lehigh University, 1928; M.E.E.» 

 Polytechnic Institute of Brooklyn, 1937. American Telephone and 

 Telegraph Company, Department of Development and Research, 

 1928-34; Bell Telephone Laboratories, 1934-. Mr. Goodale has been 

 engaged in studies of various factors affecting telephone station 

 transmission. 



W. B. Bedell, Ohio Northern University, U. S. Army, 1917-1919 

 (Lieutenant, Infantry) ; American Telephone and Telegraph Com- 

 pany, Long Lines Engineering Department, 1919-. Mr. Bedell is 

 engaged in equipment engineering work involving broad-band carrier 

 telephone systems. 



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