266 THE BELL SYSTEM TECHNICAL JOURNAL, JANUARY 1954 



telephone switching should be towards electronics. In making this step, 

 switcliing scientists and engineers can be much helped by modern electronic 

 computer technology. To be successful, they must also contribute to this 

 technology. 



LiNDHOM, P.^ 



"Feedback" — Heart of Automatic Process Control, Factory, 111, 

 pp. 106-109, Oct., 1953. 



Logan, R. A.^ 



Thermally Induced Acceptors in Single Crystal Germanium, Letter 

 to the Editor, Phys. Rev., 91, pp. 757-758, Aug. 1, 1953. 



Maita, J. P., see M. Tanenbaum. 



Mallery, P.i 



Transistors and Their Circuits in the 4A Toll Crossbar Switching 

 System, A.LE.E. Trans., Commiin. & Electronics, 8, pp. 388-392, 

 Sept., 1953. 



Malthaner, W. A} AND H. E. Vaughan^ 



Automatic Telephone System Employing Magnetic Drum Memory, 

 I.R.E., Proc, 41, pp. 1341-1347, Oct., 1953 (Monograph 2151). 



The use of magnetic drum memory in an automatic telephone switching 

 office is described. A capacitive scanner acts as a time-division connector 

 through which information generated by subscribers' telephone sets is con- 

 ve3^ed to storage on magnetic drums. Information thus accumulated is com- 

 bined with "permanent" information on the magnetic drums, processed in 

 accordance with built-in programs and dispatched to control call switching 

 circuits. Technical feasibilitj' of this system has been demonstrated by the 

 construction and successful operation of a large-scale laboratory model. 



Manley, H. a., see G. R. Crane. 



Matthl\s, B. T} 



Superconducting Compounds, Letter to the Editor, Phys. Rev., 91, 

 p. 413, July 15, 1953. 



McAfee, K. B., see K. G. McKay. 



1 Bell Telephone Laboratories. 

 ^Western Electric Company. 



