Contributors to this Issue 



Austin Bailey, A.B., University of Kansas, 1915; Ph.D., Cornell 

 University, 1920; Instructor in Physics, Cornell University, 1915-18; 

 Signal Corps, U.S.A., 1918-19; Fellow in Physics, Cornell University, 

 1919-20; Corning Glass Works, 1920-21; Assistant Professor of 

 Physics, University of Kansas, 1921-22; Department of Development 

 and Research, American Telephone and Telegraph Company, 192 2-. 

 Dr. Bailey's work while with the American Telephone and Telegraph 

 Company has been largely along the line of methods for making radio 

 transmission measurements and of long wave radio problems. 



Karl K. Darrow, B.S., University of Chicago, 1911, University 

 of Paris, 1911-12, University of Beriin, 1912; Ph.D. in Physics and 

 Mathematics, University of Chicago, 1917; Engineering Department, 

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

 1925-. Dr. Darrow has been engaged largely in writing studies 

 and analyses of various fields of physics and the allied sciences. Some 

 of his earlier articles on Contemporary Physics form the rrucleus of 

 a recently published book entitled "Introduction to Contemporary 

 Physics" (D. Van Nostrand Company). 



C. J. Davisson, B.S., University of Chicago, 1908; Ph.D., Princeton 

 University, 1911; Instructor in Physics, Carnegie Institute of Tech- 

 nology, 1911-17; Engineering Department of the Western Electric 

 Company, 1917-25; Bell Telephone Laboratories, 1925-. Dr. 

 Davisson 's work since coming with the Bell System has related largely 

 to thermionics and electronic physics. 



S. W. Dean, A.B., Harvard University, 1919; Cutting and Wash- 

 ington, Inc., 1917; Ensign, U. S. Naval Reserve Force, 1918; Radio 

 Corporation of America, 1919-25; Department of Development and 

 Research, American Telephone and Telegraph Company, 1925-. Mr. 

 Dean's work has been chiefly in connection with long wave trans- 

 atlantic radio systems. 



H. H. Glenn, B.S., Pennsylvania State College, 1909; Engineering 

 Department, Western Electric Company, 1909-25; Bell Telephone 

 Laboratories, 1925-. Mr. Glenn is engaged in apparatus development 

 work with particular reference to tinsel cords, insulated wire and 

 switchboard cable studies. 



J. Herman, E.E., Lehigh University 1920; Department of Develop- 

 ment and Research, American Telephone and Telegraph Company, 

 1920-. Mr. Herman has been engaged chiefly in telegraph trans- 

 mission development work. 



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