Contributors to this Issue 



C. F. Sacia, B.E.E., University of Michigan, 1916; Engineering 

 Department of the Western Electric Company, 1916-24; Bell Tele- 

 phone Laboratories, Inc., 1925—. Mr. Sacia has been engaged upon 

 methods for recording and analyzing speech. 



C. J. Beck, Western Electric Company Engineering Department, 

 1917; U. S. Army Air Service, 1918-19.— Since returning to the 

 Laboratories, Mr. Beck has been associated with Mr. Sacia in 

 speech analyses. 



J. J. Gilbert, A.B., University of Pennsylvania, 1909; Harvard, 

 1910-11; Chicago, 1911-12; E.E., Armour Institute, 1915; instructor 

 of electrical engineering. Armour, 1912-17; Captain Signal Corps, 

 1917-19; Engineering Department, Western Electric Company, 1919; 

 Bell Telephone Laboratories, Inc., 1925—. Mr. Gilbert has worked 

 primarily on submarine cable problems. 



R. B. Shanck, B.E.E., Ohio State University, 1915. Railroad Tele- 

 graph Service, 1909-10; Plant Department, American Telephone and 

 Telegraph Company, 1910-11 and summers 1912-14; Engineering 

 Department, 1915-19; Department of Development and Research, 

 1919 — . Since 1915 Mr. Shanck has been engaged in transmission de- 

 velopment work, on telegraph systems and compositing arrangements. 



F. B. Llewellyn, M.E., Stevens Institute of Technology, 1922; 

 graduate student, Columbia University, 1924-5; Research Depart- 

 ment, Western Electric Company, 1922-5; Bell Telephone Labora- 

 tories, 1925 — . 



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

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

 mathematics. University of Chicago, 1917; Engineering Department 

 Western Electric Company, 1917-24; Bell Telephone Laboratories, 

 Inc., 1925 — . Mr. Darrow has been engaged largely in preparing 

 studies and analyses of published research in \-arious fields of physics. 



Joseph P. Maxfield, S.B., Massachusetts Institute of Technology, 

 1910; instructor in electro-chemistry, Massachusetts Institute of 



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