Contributors to this Issue 



\\ II IlvKhiN. B.I'.. I',.. rnivci>il> nt Michigan. I'.»I2; Kiiniiii'iT- 

 iii>; 1 )i-i)artiiiom. Aim-riiaii Ti'lrplioiR- ,iiul 'l\'k-^r.i[)h ("onipaiiy, 

 l'.H2 U119; Di-partiiK'tU of Operation and Kn^ineerinjj, 191!)- . 

 Mr. Harden has licen en^a^ed in the tievelopnient of transmission 

 tnainteiiance testing methods and in the preparation of routines 

 and practiivs rwiuired for appKing these methods in the telephone 

 plant. 



John R. (arson. B.S.. IViiun-ion. I'.H)7; I"..!;., I'.lD'.i; M.S., I'.HJ; 

 Re^earih Department, West inghou.se illeelric and Maiiulacturiiig 

 Company; H)U)^12; instructor of physics and electrical engineering, 

 Princeton. Ii112 14; American Telephone and Telegraph ('oni()an\'. 

 l-'.nginiH^ring Oeixirtment, 1!)14 lo; Palciii I )r|),irlnu'm . I'.HC) 17; 

 l-.ngineering Department, 1918; Departmeiil of DcNelopnieni and 

 Research. 1919 — . Mr. Carson's work has been along theoretical 

 lines and he has published several papers on theory of electric circuits 

 and electric wave propagation. 



W II. M.VKTIN, A.B., Johns Hopkins liiiversiiy, 1909; S.B., 

 Mas>acluisetts Institute of Technology-, 1911. American Telephone 

 and Telegraph Company, Engineering Department, 1911 19; De- 

 partment of Development and Research, 1919 . Mr. Martin's 

 work has related particularly U> loading, (juality, and transmission 

 of telepht)ne sets and local circuits. 



C. \V. SMiTit, B.S.E.. University of Michigan, 191(1; Chicago 

 Telephone Company, 191f)-20; American Telephone and Telegraph 

 Company. Engineering Department ,md Dcpirimciil of Operation 

 and Engineering, 1920 — . 



R.W S. HovT. B.S. in electrical engineering, University of Wis- 

 consin, 190.5; Massachusetts Institute of Technology, 1901); M.S., 

 Princeton, 1910. American Telephone and Telegraph Company, 

 Engineering Department, 1901)07. Western Electric Company, 

 Engineering Department, 1907-11; .-\merican Telephone and Tele- 

 graph Company, Engineering Department, 1911-19; Department 

 of Development and Research, 1919 — ■. Mr. Ho\t has made con- 

 tributions to the theory of transmission lines and associated apparatus, 

 and more recently to the theor>- of crosstalk and other interference. 



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