Company, 1910-12; instructor of physics and electrical engineering, Princeton, 1912-14; American Telephone and Telegraph Company, Engeneering Department, 1914-15; Patent Department, 1916-17; Engineering Department, 1918; Department of Development 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.
J. J. Gilbert, A.B., University of Pennsylvania, 1909; Harvard, 1910-11; Chicago, 1911-12; E.E., Armour Institute, 1915; instructor of electrical engineering, Armour, 1912-17; Captain Signal Corps, 1917-19; Engineering Department, Western Electric Company, 1919, since when he has worked on submarine cable problems.
I. B. Crandall, A.B., Wisconsin, 1909; A.M., Princeton, 1910; Ph.D., 1916; Professor of Physics and Chemistry, Chekiang Provincial College, 1911-12; Engineering Department, Western Electric Company, 1913-. Dr. Crandall has published papers on infra-red optical properties, condenser transmitter, thermophone, etc. More recently he has been associated with studies on the nature and analysis of speech which have been in progress in the Laboratory.
Donald MacKenzie, A.B., Johns Hopkins, 1908; A.M., 1911; Ph.D., 1914; assistant astronomy, 1914-17; associate physicist, Bureau of Standards, 1918-20; Engineering Department, Western Electric Company, 1920-.
Harvey Fletcher, B.S., Brigham Young, 1907; Ph.D., Chicago, 1911; instructor of physics, Brighman Young, 1907-08; Chicago, 1909-10; Professor, Brigham Young, 1911-16; Engineering Department, Western Electric Company, 1916-. The present paper by Dr. Fletcher gives some of the results of an investigation which is being made of the relation between the frequency characteristics of telephone circuits and the intelligibility of transmitted speech. Dr. Fletcher has also published on Brownian movements, ionization and electronics.
