CONTRIBUTORS TO THIS ISSUE 753 



Fairchild Aerial Camera Corp., 1921-22; Western Electric Company 

 and Bell Telephone Laboratories, 1923-. Since entering the Labora- 

 tories, Mr. Morton's work has related principally to vacuum tube 

 regulators. 



D. K. Gannett, B.S. in engineering, 1916, University of Minnesota; 

 E.E., 1917; American Telephone and Telegraph Company, Engineering 

 Department, 1917-19, and Department of Development and Re- 

 search, 1919-. During the war, Mr. Gannett was engaged in de- 

 velopment work on amplifiers for submarine cable telegraphy. Since 

 then, his work has been in connection with the transmission develop- 

 ment problems of toll line signaling, vacuum tubes, telephotography 

 and television. 



E. L Green, A.B., Westminster College (Fulton, Mo.), 1915; 

 L^niversity of Chicago, 1915-16; professor of Greek, Westminster 

 College, 1916-17; Captain, U. S. Army, 1917-19; B.S. in elec- 

 trical engineering. Harvard LTniversity, 1921 ; Department of Develop- 

 ment and Research, American Telephone and Telegraph Company, 

 192 1-. Mr. Green has been engaged largely on work in connection 

 with carrier transmission problems and development. 



Edward L. Nelson, B.S. in electrical engineering. Armour Institute 

 of Technology, 1914; Engineering Department of Western Electric 

 Company, 1917; technical expert. Bureau of Engineering, Navy 

 Department, 1917-18; Lieut. U. S. N. R. P., 1918-19; Engineering 

 Department of Western Electric Company and Bell Telephone 

 Laboratories, 1919-. Mr. Nelson has been closely connected with the 

 development of radio apparatus, particularly transmitting equipment 

 for ship-to-shore telephony and for broadcasting. 



Karl K. Darrow, S.B., University of Chicago, 1911; University 

 of Paris, 1911-12; University of Berlin, 1912; Ph.D. in physics and 

 mathematics. University of Chicago, 1917; Engineering Department, 

 Western Electric Company and Bell Telephone Laboratories, 1917-. 

 Dr. Darrow has been engaged largely in preparing studies and analyses 

 of published research in various fields of physics. 



R. L. Young, B.S. in electrical engineering, University of Pennsyl- 

 vania, 1907; Westinghouse Electric and Manufacturing Company, 

 1907-09; Carnegie Institute of Technology, instructor of mathematics, 

 1909-10; McGraw Publishing Company, district manager Pittsburgh 

 and assistant manager New York of Metallurgical and Chemical 

 Engineering, and editorial board Electrical World, 1909-11; Engineer- 



