Contributors to this Issue 



H. W. Bode, A.B., Ohio State University, 1924; M.A., 1926. 

 Bell Telephone Laboratories, 1926-. Mr. Bode has been engaged in 

 the study of transmission networks, such as wave filters, attenuation 

 equalizers, and phase correctors. 



A. E. BowEX, Ph.B., Yale University, 1921; Instructor, Depart- 

 ment of Physics, Yale University, 1921-24; American Telephone 

 and Telegraph Company, Department of Development and Research, 

 1924-. Mr. Bowen has been engaged mainly in work on problems of 

 inductive coordination of power and communication systems. 



I\ARL K. Darrow, B.S., University of Chicago, 1911; University 

 of Paris, 1911-12; University of Berlin, 1912; Ph.D., University of 

 Chicago, 1917; Western Electric Company, 1917-25; Bell Telephone 

 Laboratories, 1925-. Dr. Darrow has been engaged largely in writing 

 on various fields of physics and the allied sciences. Some of his earlier 

 articles on Contemporary Physics form the nucleus of a recently 

 published book entitled "Introduction to Contemporary Physics" 

 (D. \'an Nostrand Company). A recent article has been translated 

 and published in Germany under the title "Einleitung in die Wellen- 

 mechanik." 



Ward F. Davidson, B.S.E., L'niversity of Michigan, 1913; M.Sc, 

 1920; Westinghouse Electric and Manufacturing Company, 1914-16; 

 L^niversity of Michigan, teaching electrical engineering, 1916-22 

 except for two years war duty; Brooklyn Edison Company, Inc., 

 Director of Research, 1922-. He has devoted much time to theoretical 

 and experimental study of underground power transmission cables. 



C. L. GiLKEsoN, B.S., Massachusetts Institute of Technology, 1922, 

 M.S., 1923; Transmission and Distribution Department of the Phila- 

 delphia Electric Company, 1923-26; National Electric Light Asso- 

 ciation 1926-. Mr. Gilkeson's work with the N.E.L.A, has been in 

 connection with the research program of the Joint Subcommittee on 

 Development and Research of the N.E.L.A. and Bell System. Much 

 of his work has been associated with problems of low frequency induc- 

 tion. 



E. I. Green, A.B., Westminster College (Fulton, Mo.), 1915; Uni- 

 versity of Chicago, 1915-16; U. S. Army, 1917-19 (Captain, Infantry); 

 B.S. in Electrical Engineering, Harvard University, 1921; Depart- 

 ment of Development and Research, American Telephone and Tele- 



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