CONTRIBl'TORS TO THIS I.SSUP: 483 



Engineer, Dr. Kelly has worked mi the developnienl of llu'nnionic 

 and photoelectric devices. 



D. Mitchell, B.S., Princeton University, 1925. Department of 

 Development and Research, American Telephone and Telegraph Com- 

 pany, 1925-. Mr. Mitchell has been engaged in transmission develop- 

 ment work on voice-operated devices and problems of interconnecting 

 wire and radio telephone systems. 



H. H. Nance, Washington University, 1906 10. American Tele- 

 phone and Telegraph Company, Long Lines Plant Department, 1910- 

 23; Long Lines Engineering Department, Acting Engineer of Trans- 

 mission, 1923; Engineer of Transmission, 1924-1928; Plant Extension 

 Engineer, 1928-. 



C. H. Prescott, Jr., B.A., Yale University, 1922; Ph.D., California 

 Institute of Technology, 1926; Research Fellow, California Institute 

 of Technology, 1926-27; National Research Fellow in Chemistry, 

 1927-28. Bell Telephone Laboratories, 1928-. Dr. Prescott has been 

 engaged in development and research on photoelectric and thermionic 

 vacuum tubes. 



K. L. Scott, B.S. in Electrical Engineering, University of Wisconsin, 

 1921; M.S. in E.E., 1928; Instructor in Electrical Engineering, Uni- 

 versity of Wisconsin, 1921-24. Engineer, Western Electric Company, 

 1926-. Mr. Scott has been engaged in laboratory investigations of 

 magnet steels and permanent magnets, and the development of manu- 

 facturing processes and equipment in connection with magnet manu- 

 facture. 



E. J. Sterba, B.E. in Electrical Engineering, State University of 

 Iowa, 1920. Engineering Department, Western Electric Company, 

 1920-25; Bell Telephone Laboratories, 1925-. Mr. Sterba has been 

 engaged chiefly in the development of transmitting antennas and 

 apparatus related to antennas. 



S. B. Wright, M.E., M.E.E., Cornell University, 1919. Depart- 

 ment of Development and Research, American Telephone and Tele- 

 graph Company, 1919-. Mr. Wright has been engaged in transmission 

 development work on voice-operated devices and problems of inter- 

 connecting w'ire and radio telephone systems. 



