Contributors to this Issue 



Sidney Darlington, B.S., Harvard University, 1928; B.S. in E.E., 

 Massachusetts Institute of Technology, 1929; Ph.D., Columbia Uni- 

 versity, 1940. Bell Telephone Laboratories, 1929-. Dr. Darlington has 

 been engaged in research in applied mathematics with emphasis on 

 network theory. 



Paul G. Edwards, B.E.E., Oliio State University, 1924; E.E., Ohio 

 State University, 1929. Western Union Telegraph Company, 1919-22; 

 American Telephone and Telegraph Company, 1922-34; Bell Telephone 

 Laboratories, 1934-. His main concern in the Laboratories has been 

 with toll transmission problems, including voice frequency and carrier 

 systems. Member of the I.R.E., A.I.E.E., Sigma Xi, Tau Beta Pi, and 

 Eta Kappa Nu. 



C. W. Harrison, B.S. in E.E., Purdue University, 1938; M.S., Lehigh 

 University, 1940. Bamberger Broadacasting Company, 1939-41. Bell 

 Telephone Laboratories, 1941-. Mr. Harrison is a member or the tele- 

 vison research group. He formerly designed radio receivers and, later, 

 microwave relay repeaters. Member of the I.R.E. 



John L. Hysko, B.S. in E.E., Cooper Union, 1921. U. S. Army, 

 1918-19. Bell Telephone Laboratories, 1919-. Mr, Hysko's principal 

 activities in the Laboratories have been in the development of amphtude- 

 modulation and frequency-shift carrier telegraph systems for land line, 

 radio teletypewriter and submarine cable applications. 



Edwin F. Kingsbury, B.S., Colgate University, 1910. United Gas 

 Improvement Company, 1910-18. U. S. Army, 1918-19. Eastman Kodak 

 Company, 1919-20. Bell Telephone Laboratories, 1920-51. Mr. Kings- 

 bury retired in 1951 after a career which was primarily concerned with 

 television research and development, especially that part dealing with 

 photoelectric and electrooptical problems. Member of the Frankhn In- 

 stitute, the Optical Society of America, and Phi Beta Kappa; Fellow of 

 the American Physical Society and the American Association for the 

 Advancement of Science. 



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