Contributors to this Issue 



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; U. S. Army Air Service, 1918-19; research engineer, 

 Western Electric Company and Bell Telephone Laboratories, 1919 to 

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

 measurement and utilization of light. 



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 as- 

 sociated with Dr. Ives in his studies on light. 



J. W. HoRTON, B.S., Massachusetts Institute of Technology, 1914; 

 instructor in physics, 1914-16; Engineering Department of the West- 

 ern Electric Company and Bell Telephone Laboratories, 1916-. Mr. 

 Horton has been closely connected with the development of apparatus 

 for carrier current communication. 



R. C. Mathes, B.Sc, University of Minnesota, 1912; E.E., 1913; 

 Engineering Department of the Western Electric Company and Bell 

 Telephone Laboratories, 1913-. Mr. Mathes has played an important 

 part in the repeat development program and in the design of vacuum 

 tube amplifiers for a wide variety of uses. 



H. M. Stoller, degree of E.E. from Union College, 1913; M.S. in 

 electrical engineering, 1915; Engineering Department of the Western 

 Electric Company and later Bell Telephone Laboratories, 1914 and 

 1916-. Most of Mr. Stoller 's work has dealt with special problems 

 connected with electrical power machinery, particularly voltage and 

 speed regulators. He designed a multi-frequency generator which is 

 now employed in the voice frequency carrier telegraph system. 



E. R. Morton, M.E., Stevens, 1917; Western Electric Company 

 and Electric Test Lab., 1917-18; Air Service, U. S. Army, 1918; 

 development and manufacturing control of color motion pictures, 

 1919; Harvard, 1920, electro-chemical investigations of nickel; 



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