192 BELL SYSTEM TECHNICAL JOURNAL 



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, voice frequency re- 

 peaters, and radio terminating circuits. 



E. I. Green, A.B., Westminster College, Fulton, Missouri, 1915; 

 University of Chicago, 1915-16; Member of Faculty, Westminster 

 College, 1916-17; U. S. Army, 1917-19 (Captain, Infantry); B.S. in 

 Electrical Engineering, Harvard University, 1921. American Tele- 

 phone and Telegraph Company, Department of Development and 

 Research, 1921-34; Bell Telephone Laboratories, 1934-. Mr. Green's 

 work has been concerned principally with multiplex transmission 

 systems. 



L. M. Ilgenfritz, B.S. in Electrical Engineering, University of 

 Michigan, 1920. American Telephone and Telegraph Company, De- 

 partment of Development and Research, 1920-34; Bell Telephone 

 Laboratories, 1934-. Mr. Ilgenfritz has been engaged in the develop- 

 ment of carrier systems. 



A. Kenner, B.S. in Electrical Engineering, Purdue University, 

 1913. Western Electric Company, Engineering Department, 1913- 

 25; Bell Telephone Laboratories, 1925-. Mr. Kenner has been en- 

 gaged in equipment development work for toll systems, particularly 

 those items such as telephone repeaters and carrier associated with 

 toll cables. 



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

 Iowa, 1921. Western Electric Company, Engineering Department, 

 1921-25; Bell Telephone Laboratories, 1925-. Mr. Lane is engaged 

 in the development of special filters such as mechanical filters, filters 

 in which quartz crystals are used as elements, and high-frequency 

 filters of all types. 



R. H. Mills, S.B. in Electrical Engineering, Massachusetts In- 

 stitute of Technology, 1916. Western Union Telegraph Company, 

 1916-18. Western Electric Company, Transmission Development 

 Branch, 1918-25; Bell Telephone Laboratories, Apparatus Develop- 

 ment Department, 1925-. Mr. Mills has been engaged in the develop- 

 ment of carrier frequency filters for use in commercial communication 

 systems. 



A. L. Samuel, A.B., College of Emporia (Kansas), 1923; S.B. and 

 S.M. in Electrical Engineering, Massachusetts Institute of Technology, 



