Contributors to This Issue 



Donald C. Bennett, B.S. 1949 and M.S. 1951, Rensselaer Poly- 

 technic Institute; Battelle Memorial Institute, 1951-1952; Bell Tele- 

 phone Laboratories, 1952-. Mr. Bennett has been engaged in the de- 

 velopment of processes for producing single crystals suitable for use 

 in transistors. He is a member of the American Institute of Mining and 

 Metallurgical Engineers. 



F. G. BuHRENDORF, B.S.M.E. and M.E., Cooper Union Inst. Tech. 

 1925. Bell Telephone Laboratories 1925-. Mr. Buhrendorf's early Labo- 

 ratories work included the design of switchboard apparatus and sound 

 recording and reproducing equipment ; among the latter were the Mirro- 

 phone and the stereophonic equipment demonstrated at the New York 

 World's Fair. During World War II he was concerned with the design 

 of mechanical components of a number of radar systems, particularly 

 antenna drives and range units. After the war he resumed his work on 

 high-quality sound reproduction and more recently has devoted his 

 efforts to the design of magnetic drum units for digital data storage and 

 special machinery for the purification and production of single-crystal 

 semiconductors. He is a New York State Professional Engineer. 



Calvin S. Fuller, B.S. 1926 and Ph.D. 1929, University of Chicago. 

 Bell Telephone Laboratories, 1930-. His early work was on organic in- 

 sulating material, after which he made studies of plastics and synthetic 

 rubber including investigations of the molecular structure of polymers 

 and the development of plastics and rubbers. Since 1948 Dr. Fuller has 

 concentrated on semiconductor research and the development of semi- 

 conductor devices. His work led to a techniciue of diffusing impurities -. 

 into the surface of a silicon wafer, a preparation basic to the Bell Solar (j 

 Battery and other silicon devices. He is a member of the A.C.S., an 

 associate member of the A.P.S. and a member of the A.A.A.S. 



H. A. Henning, B.S. in ElcctrocluMuical Engineering, Pennsylvania 

 State College 1926; Columbia University 1930-33. Bell Telephone 



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