Contributors to this Issue 



Elizabeth J. Armstrong, M.A. in Geology, Bryn Mawr College, 1934; 

 Ph.D., 1939. Lecturer in Geology, Barnard College, 1938-41; Research 

 Assistant, Columbia University, 1941-42; National Research Council 

 Fellow, 1942-43; Bell Telephone Laboratories, 1943-. Miss Armstrong 

 has been working chiefly on problems related to the orientation of piezo- 

 electric crystal plates. 



Ralph B. Blackman, A.B. in Physics and Engineering, California 

 Institute of Technology, 1926. Member of technical staff, Bell Telephone 

 Laboratories, 1927-. Engaged in research and consultation in applied 

 mathematics. 



Walter L. Bond, B.S. in Physics, Washington State College, 1927; 

 M.S. 1928. Member of Technical Staff, Bell Telephone Laboratories 

 1928-. Studied at Columbia University, New York University, and 

 Stevens Institute. Engaged primarily in studies of the physical properties 

 of crystals. 



Karl 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, 1917-25; Bell Telephone Laboratories, 1925- 

 As Research Physicist, Dr. Darrow has been engaged largely in writing 

 on various fields of physics and the allied sciences. 



K. G. Van Wynen, E.E., Cornell University, 1925; M.E.E., Brooklyn 

 Polytechnic Institute, 1933; American Telephone and Telegraph Company, 

 1925-1934; Bell Telephone Laboratories, Inc., 1934-. Mr. Van Wynen 

 has worked principally on special problems arising from transmission 

 studies of the local telephone plant. 



G. W. WiLLARD, B.A., University of Minnesota, 1924; M.A., 1928; 

 Instructor in Physics, University of Kansas, 1927-28; Student and As- 

 sistant, University of Chicago, 1928-30. Bell Telephone Laboratories, 

 1930-. Mr. Willard's work has had to do with special problems in piezo- 

 electric crystals. 



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