Contributors to this Issue 



C. B. H. Feldman, B.Sc, University of Minnesota, 1926; Teaching 

 Fellow, University of Minnesota, 1926-28; M.Sc, University of Minne- 

 sota, 1928. Bell Telephone Laboratories, 1928-. Mr. Feldman has 

 been engaged in short-wave radio receiving. His work has been mainly 

 on transmission lines, antennas, and wave propagation problems. 



P. B. Flanders, A.B., Harvard University, 1920; S.B. in Electrical 

 Engineering, 1922. Engineering Department, Western Electric Com- 

 pany, 1922-25; Bell Telephone Laboratories, 1925-. Mr. Flanders 

 has worked principally on acoustic devices and on the development of 

 acoustic measuring methods. 



Bancroft Gherardi, B.Sc, Polytechnic Institute, Brooklyn, N. Y., 

 1891; M.E., Cornell University, 1893; M.M.E., Cornell University, 

 1894. New York Telephone Company, Engineering Assistant, 1895- 

 99; Traffic Engineer, 1899-1900. New York and New Jersey Tele- 

 phone Company, Chief Engineer, 1900-06. New York Telephone 

 Company, and New York and New Jersey Telephone Company, 

 Assistant Chief Engineer, 1906-07. American Telephone and Tele- 

 graph Company, Equipment Engineer, 1907-09; Engineer of Plant, 

 1909-18; Acting Chief Engineer, 1918-19; Chief Engineer, 1919-20; 

 Vice President and Chief Engineer, 1920-. Mr. Gherardi is a Past 

 President of the American Institute of Electrical Engineers and is now 

 President of the American Standards Association. 



H. C. Harrison, A.B., Colorado College, 1910; S.B., Massachusetts 

 Institute of Technology, 1913; Instructor in Electrical Engineering, 

 Massachusetts Institute of Technology, 1913-14. Western Electric 

 Company, 1914-24; Bell Telephone Laboratories, 1925-. As Special 

 Transmission Instruments Research Engineer, Mr. Harrison has been 

 instrumental in applying the principles of electric transmission theory 

 to sound recording and reproducing equipment. 



M. J. Kelly, B.S., Missouri University, 1914; M.S., University of 

 Kentucky, 1915; Ph.D., University of Chicago, 1919; Instructor of 

 Physics, University of Kentucky, 1914-15; Research Assistant, Univer- 

 sity of Chicago, 1915-18. Western Electric Company, 1918-25; Bell 

 Telephone Laboratories, 1925-. As Vacuum Tube Development 



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