250 BELL SYSTEM TECHNICAL JOURNAL 



E. L. Norton, S.B. in Electrical Engineering, Massachusetts Insti- 

 tute of Technology, 1922; M.A., Columbia University, 1925. Western 

 Electric Company, Engineering Department, 1922-25; Bell Tele- 

 phone Laboratories, 1925-. Mr. Norton has been engaged in the 

 study of network and transmission problems. His present work is in 

 connection with signaling circuits and apparatus. 



ToDOs M. Odarenko, University of Technique in Prague, E.E., 

 1928. New York Telephone Company, 1928-30; Bell Telephone 

 Laboratories, 1930-. Mr. Odarenko has been engaged in the measure- 

 ment and study of transmission characteristics of existing and newly 

 developed types of transmission lines. 



S. A. ScHELKUNOFF, B.A., M.A. in Mathematics, The State College 

 of Washington, 1923; Ph.D. in Mathematics, Columbia University, 

 1928. Engineering Department, Western Electric Company, 1923-25 ; 

 Bell Telephone Laboratories, 1925-26. Department of Mathematics, 

 State College of Washington, 1926-29. Bell Telephone Laboratories, 

 1929-. Dr. Schelkunoff has been engaged in mathematical research, 

 especially in the field of electromagnetic theory. 



Albert C. Walker, B.S., Massachusetts Institute of Technology, 

 1918; Ph.D., Yale University, 1923. Bell Telephone Laboratories, 

 1923-. Dr. Walker has been engaged in developing and applying 

 methods of improving the electrical properties of textile insulation and 

 methods for the inspection control of commercially purified textiles for 

 telephone apparatus. 



R. E. Waterman, B.S. in Chemical Engineering, Williams College 

 and Massachusetts Institute of Technology. Western Electric Com- 

 pany, 1922-25; Bell Telephone Laboratories, 1925-. Mr. Waterman 

 has been engaged in organic and biochemical investigations and for the 

 past few years has been in charge of a group studying the chemical 

 phases of wood preservation. 



