CONTRIBUTORS TO THIS ISSUE 545 



Telephone Laboratories, 1925-. Mr. Murphy's work is largely con- 

 fined to the study of the electrical properties of dielectrics. 



Liss C. Peterson. Chalmers Technical Institute, Gothenburg, 

 1920; Technical Universities of Charlottenburg and Dresden, 1920-23. 

 American Telephone and Telegraph Company, 1925-30; Bell Tele- 

 phone Laboratories, 1930-. Mr. Peterson is engaged in amplifier 

 research. 



John R. Townsend, Brooklyn Polytechnic Institute. Bethlehem 

 Steel Company, 1915-17. Mathematics and Dynamics Branch, U. S. 

 Ordnance Department, 1917-19. Member of Technical Staff, Western 

 Electric Company, 1919-25; Bell Telephone Laboratories, 1925-. 

 He is now Materials Standards Engineer. He is the author of "Fa- 

 tigue Studies of Telephone Cable Sheath Alloys," "Physical Properties 

 and Methods of Test for Some Sheet Non-ferrous Metals," and also of 

 many other articles published in technical magazines and discussed 

 before engineering societies. Awarded Dudley Medal, A.S.T.M., 1930. 



