The Contributors to this Issue 



Ray S. Hoyt, B.S. in electrical engineering, University of Wis- 

 consin, 1905; Massachusetts Institute of Technology, 1906; M.S., 

 Princeton, 1910. American Telephone and Telegraph Company, 

 Engineering Department, 1906 07. Western Electric Company, 

 Engineering Department, 1907-11 ; American Telephone and Tele- 

 graph Company, Engineering Department, 1911-19; Department of 

 Development and Research, 1919 — . Mr. Hoyt has made contri- 

 butions to the theory of transmission lines and associated appar- 

 atus, and more recently to the theory of crosstalk and other inter- 

 ference. 



Arthur F. Rose, B.S., Colorado College, 1914. Engineering 

 Department, American Telephone and Telegraph Company, 1914-19; 

 Department of Operation and Engineering, 1919 — . Mr. Rose's 

 work has been largely in connection with carrier, general transmission 

 and radio matters. 



Edward B. Craft, Engineering Department, Western Electric 

 Company, Chicago, 1902-7; Development Engineer, Western Elec- 

 tric Company at New York, 1907-18; Assistant Chief Engineer, 

 1918-22; Chief Engineer, 1922—. 



Mr. Craft has been in charge for the Western Electric Company 

 of the entire program of development work along machine switching 

 lines. He has written papers on radio telephony and electrical com- 

 munications in war time. 



L. F. Morehouse, B.S., University of Michigan, 1897; A.M., 1904; 

 instructor in physics, University of Michigan, 1902-4; junior professor 

 of Electrical Engineering, 1904-6; Transmission Engineer for West- 

 ern Electric Company in Europe, 1906 9; Equipment Engineer, 

 American Telephone and Telegraph Company, 1909-19; Equipment 

 Development Engineer, 1919 — . Mr. Morehouse is responsible for 

 the development and research work affecting the central office and 

 substation equipment of the Bell System, and for the establishment 

 of such standards of central office and substation equipment as are 

 warranted by the results of this development and research work, 



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