CONTRIBUTORS TO THIS ISSUE 601 



he received the voice in Hawaii from Arlington, Va. He has partici- 

 pated in a number of international conferences on electric communica- 

 tions. 



Frank Gray, B.S., Purdue, 1911; instructor and graduate student 

 in physics at the University of Wisconsin, Ph.D., 1916; member of the 

 Naval Experimental Station during the war. Mr. Gray entered the 

 Bell Telephone Laboratories — then the Engineering Department of the 

 Western Electric Company — in 1919 and has been closely associated 

 with Dr. Ives in his studies on light. 



C. W. Green, B.S. in Electrical Engineering, University of Wiscon- 

 sin, 1907 ; Instructor and Assistant Professor, Massachusetts Institute 

 of Technology, 1907-17; Captain 1917, Major 1918, U. S. Army; Bell 

 Telephone Laboratories, 1919. Mr. Green's work has had to do with 

 the development of Carrier Telephone Systems and Voice Frequency 

 Repeaters. 



Herbert E. Ives, B.S., University of Pennsylvania, 1905; Ph.D., 

 Johns Hopkins, 1908; assistant and assistant physicist, Bureau of 

 Standards, 1908-09; physicist, Nela Research Laboratory. Cleveland 

 1909-12; physicist. United Gas Improvement Company, Philadelphia, 

 1912-18; V. S. Army Air Service, 1918-19; research engineer, \\'estern 

 Electric Company and Bell Telephone Laboratories, 1919 to date. 

 Dr. Ives' work has had to do principally with the production, measure- 

 ment and utilization of light. 



C. E. Lane, A.B., University of Iowa, 1920; M.S., University of 

 Iowa, 1921; Engineering Department of the Western Electric Com- 

 pany, 1921-25; Bell Telephone Laboratories, 1925-. During the last 

 four years Mr. Lane has been engaged in the development of such trans- 

 mission networks as filters, attenuation equalizers and phase correctors 

 in the Apparatus Development Department. The five years prior to 

 this were spent by him in the Research Department, engaged in general 

 studies in acoustics, such as speech, hearing and loud speaker dev'elop- 

 ment. 



W. H. Martin, A.B., Johns Hopkins University, 1909; B.Sc, 

 Massachusetts Institute of Technology, 1911; American Telephone 

 and Telegraph Company, Engineering Department, 1911-19; Depart- 

 ment of Development and Research, 191 9-. Mr. Martin's work has 

 related particularly to transmission of telephone sets and local ex- 

 change circuits, transmission quality and loading. 



H. Nyquist, B.S. in Electrical Engineering, North Dakota, 1914; 

 M.S., North Dakota, 1915; Ph.D., Yale, 1917; Engineering Depart- 



