THE CONTRIBUTORS TO THIS ISSUE 187 



Engineering Department of the Western Electric Company, 1906 — . 

 One of Mr. Elmen's principal lines of work has been magnetic in- 

 vestigations. 



Charles S. Demarest, E.E., University of Minnesota, 1911; 

 American Telephone and Telegraph Company, Engineering Depart- 

 ment, 1911-19; Department of Development and Research, 1919 — . 

 Mr. Demarest's work has been connected with the development of 

 equipment for toll telephone systems, including that for long distance 

 cables, carrier and radio systems. 



H. W. Nichols, B.S., Armour Institute, 1908; E.E., 1911; M.S., 

 Chicago, 1909; Ph.D., 1918; assistant professor electrical engineering, 

 Armour, 1909-14; Engineering Department of Western Electric 

 Company, 1914 — . Since joining the research staff of the Western 

 Electric Company, Dr. Nichols has been taking a leading part in the 

 development of radio apparatus. 



Lloyd Espenschied, Pratt Institute, 1909; United Wireless Tele- 

 graph Company as radio operator, summers, 1907-08; Telefunken 

 Wireless Telegraph Company of America assistant engineer, 1909- 

 10; American Telephone and Telegraph Company, Engineering 

 Department and Department of Development and Research, 1910 — . 

 Took part in long distance radio telephone experiments from Wash- 

 ington to Hawaii and Paris, 1915; since then his work has been con- 

 nected with the development of radio and carrier systems. 



