1022 THE BELL SYSTEM TECHNICAL JOURNAL, JULY 1954 



netic drum, video transmission e valuator, vibrating reed selector, de- 

 velopment of wire-spring relay, trouble recording apparatus development, 

 and transistor circuitry for a subscriber line concentrator. He is cur- 

 rently engaged in developing small functional circuits for an electronic 

 switching system. Member of Tau Beta Pi and Pi Tau Sigma. 



Erling D. Sunde, E.E., Technische Hochschule, Darmstadt, Ger- 

 many, 1926. Brooklyn Edison Company, 1927 ; American Telephone and 

 Telegraph Company, 1927-1934; Bell Telephone Laboratories, 1934-. 

 Mr. Sunde 's work has been centered on theoretical and experimental 

 studies of inductive interference from railway and power systems, light- 

 ning protection of the telephone plant, and fundamental transmission 

 studies in connection with the use of pulse modulation systems. Author 

 of Earth Conduction Effects in Transmission Systems, a Bell Laboratories 

 Series Book. Member of the A.I.E.E., the American Mathematical So- 

 ciety, and the American Association for the Advancement of Science. 



Laurence R. Walker, B.Sc. and Ph.D., McGill University, 1935 and 

 1939; University of California, 1939-41. Radiation Laboratory, Mass- 

 achusetts Institute of Technology, 1941-1945; Bell Telephone Labora- 

 tories, 1945-. Dr. Walker has been primarily engaged in research on 

 microwave oscillators and amplifiers. At present he is a member of the 

 physical research group concerned with the applied physics of solids. 

 Fellow of the American Physical Society. 



