Contributors to this Issue 



Edwin H. Colpitts, who has recently retired as Executive Vice Presi- 

 dent of the Bell Telephone Laboratories, scarcely needs an introduction. 

 In 1899 he left Harvard to begin his career of research and development 

 in the Bell System. In 1907, when development work was transferred 

 from Boston to the Engineering Department of the Western Electric 

 Company in New York, he also transferred and headed the Physical 

 Laboratory. Later, with the formation of a Research Department, he 

 became its head. In 1933, preliminary to the consolidation of the 

 Department of Development and Research of the American Telephone 

 and Telegraph Company with the Laboratories, Dr. Colpitts was 

 appointed Executive Vice President. 



W. B. Ellwood, A.B., University of Missouri, 1924; M. A., Columbia 

 University, 1926; Ph.D., Columbia University, 1933. Bell Telephone 

 Laboratories, 1930-. Dr. Ellwood has been engaged in various in- 

 vestigations relating to magnetic materials and measurements. 



C. N. Hickman, A.B., Winona College, 1914; M.A., Clark Uni- 

 versity, 1917; Ph.D., Clark University, 1922. Physicist, Bureau of 

 Standards, 1919-22; Physicist, U. S. Navy Yard, 1922-24; Research 

 Physicist, American Piano Company, 1924^30; Bell Telephone Labora- 

 tories, 1930-. Since 1930 Dr. Hickman has been engaged in the 

 development of special acoustical instruments. 



C. M. Hill, B.S. in Chemistry, Princeton University. American 

 Telephone and Telegraph Company, Long Lines Department, 1929-30; 

 Bell Telephone Laboratories, 1930-. Mr. Hill's work has been on the 

 biometrical problems of wood preservation. 



Victor E. Legg, B.A., 1920, M.S., 1922, University of Michigan. 

 Research Department, Detroit Edison Company, 1920-21 ; Bell Tele- 

 phone Laboratories, 192 2-. Mr. Legg has been engaged in the develop- 

 ment of magnetic materials and in their applications, particularly for 

 the continuous loading of cables, and for compressed dust cores. 



John Leutritz, B.S. in Chemistry, Bowdoin College, 1929; A.M. in 

 Botany, Columbia University, 1934. U. S. Navy, Medical Corps, 

 1921-25. Bell Telephone Laboratories, 1929-. Mr. Leutritz' interest 

 has been along biological lines, primarily in respect to wood preservation. 



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