Contributors to this Issue 



Hi;khi-,ki \:. I\i;s, U.S.. rni\rr^it>- ol l'riins\ K.mi^i. IIMI.'); I'li.I)., 

 Johns Hopkins. 1!)08; assistant and assistant |)h_\sirist, Hiireaii of 

 Standards. liU)S ()(); [)hysicist, Nila Ri-soarch I-ahoralory, ("kveland, 

 P.KH.t 12; physicist, rnited Cias IniprovcnR'nt C"onipan\'. F'hiladi-Iphi.x, 

 liU'2 18; r. S. .-\rniy Air SiT\icf, IDIS M); research iiijiiiuer. W'esteVn 

 Electric Company (Bell Telephone I,alK)ratories), 191!) to date. 

 Dr. Ives" work has had to do principally with the production, measure- 

 ment and utilization of liijlit. 



J. \V. HuRToN, B.S., Massachusetts Institute of Technolojiy, 1914; 

 instructor in physics, 1914-lt); HnjjineerinR Department of the 

 Western Electric Company, 1911) — . Mr. Horton has been cfosely 

 connected with the development of apparatus for carrier current 

 commimication. 



R.\i.zi;monu D. P.\kki:r. B.S., I'niversity of Michigan, 190.'); M.S., 

 190(5; instructor in Electrical Engineering, l'ni\-ersity of Michigan, 

 l9(H>-09; assistant professor, 1909 1."?; Engineering Department, 

 .American Telephone and Telegraph Company, 1913-19; Department 

 of Development and Research, 1919 — . Mr. Parker's work has 

 related particularh- to telegraphy, included the development of 

 printing telegraph apparatus, carrier, and metallic circuit systems 

 for fine wire cables. 



A. B. Cl..\RK, B.E.K., I'niversity of Michigan. 1911; .\nurican 

 Telephone and Telegraph Company, Engineering Department, 

 1911-19; Department of Development and Research, 1919 — . Mr. 

 Clark's work has been connected with toll telephone and telegraph 

 systems. 



H. \V. Nichols, B.S., 1908. E.E.. 1911. Armour Institute of Tech- 

 nolog>-; M.S.. 1909, Ph.D., 1918. University of Chicago; Assistant 

 Professor of Electrical Engineering, Armour Institute of Technology, 

 1909-14; Engineering Department, Western Electric Company (Bell 

 Telephone Laboratories), 1914 — . Since 1916 Mr. Nichols has been 

 in charge of the laboratories research in radio communication. 



J. C. ScHELLENG, A.B.. 1915; instructor in physics, Cornell I'ni- 

 versity, 191") 18; Engineering Department, Western Electric Com- 

 pany (Bell Telephone Laboratories), 191& — . Since 1918, Mr. Schelleng 

 has been engaged in research in radio communication. 



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