CONTRIBUTORS TO TIUS ISSUE 179 



ticularly for the continuous loadine: of cables, and for compressed dust 

 cores. 



J. P. ScHAFER, B.S. in Electrical Engineering, Cooper Union, 1921; 

 E.E., Cooper Union, 1925. Western Electric Company, 1915-25; 

 Bell Telephone Laboratories, 1925-. Since 1928 Mr. Schafer has 

 devoted a large part of his time to radio studies of the ionosphere. 



S. A. ScHELKUXOFF, B.A., M.A., in Mathematics, The State College 

 of Washington, 1923; Ph.D. in Mathematics, Columbia University, 

 1928. Engineering Department, Western Electric Company, 1923-25. 

 Bell Telephone Laboratories, 1925-26, Department of Mathematics, 

 State College of Washington, 1926-29. Bell Telephone Laboratories, 

 1929-. Dr. Schelkunoflf has been engaged in mathematical research, 

 especially in the field of electromagnetic theory. 



A. M. Skellett, A.B., 1924, I\LS., 1927, Washington University; 

 Ph.D., Princeton University, 1933; Instructor, 1927-28, Assistant 

 Professor of Physics, 1928-29, University of Florida. Bell Telephone 

 Laboratories 1929-. Dr. Skellett, formerly engaged in investigations 

 pertaining to the transatlantic radio telephone, is concerned with 

 applications of electronic and ionic phenomena. 



