36 BELL SYSTEM TECHNICAL JOURNAL 



2. "Developments in the Manufacture of Copper Wire," J. R. Shea and S. McMullan, 



Western Electric Company, Inc. Jour. A. I. E. E., Vol. XLVI, February 1927. 

 Bell System Technical Journal, Vol. VI, April 1927. 



3. Stresses in Wire Drawing (Digest of research work conducted at Sheffield University, 



England), A. C. Blackall, Wire and Wire Products, August 1933. 

 Fundamentals of Wire Drawing, F. C. Thompson, Victoria University of Manchester 

 England, The Iron Age, October 13, 1908. 



4. "Development of Wire Drawing Methods," J. R. Shea, Western Electric Company, 



Inc. Part three of papers presented at the Hawthorne Works of the Western Elec- 

 tric Company, Inc., Chicago, Illinois, July 10-12, 1929, to the Summer School for 

 Engineering Teachers sponsored by the Society for the Promotion of Engineering 

 Education. 



5. A quantitative physical law governing the fall of small particles in various media due 



to gravity. Handbook of Chemistry and Physics, p. 2224, 24th Edition 1940-41. 



6. "Manufacture of Quartz Crystal Filters," G. K. Burns, Western Electric Company, 



Inc. BeU Telephone System Technical Publications Monograph B-1253. 



7. "Variation of Hardness in the Diamond," E. H. Kraus and C. B. Slawson, University 



of Michigan, The American Mineralogist, November 1939. 



