* Digest of a paper to be presented at the Winter Convention of the American Institute of Electrical Engineers, New York, January 25-29, 1937, and published in full in Electrical Engineering, Vol.
EN years have elapsed since the opening to public use on January 7, 1927, of the first long distance radio telephone circuit.
* Digest of a paper presented before the Annual Convention of the Institute of Radio Engineers, May 11-13, 1936, at Cleveland, Ohio, and to be published later in the Proceedings.
HE value of paints for the protection of metal surfaces depends upon their effectiveness as physical barriers against the corrosive elements of the surrounding environment and upon the electrochemi
N connection with inductive coordination problems it is frequently necessary to estimate low-frequency ground-return mutual impedances between power and communication lines.
S a result of pulse measurements made at Deal, New Jersey, during the partial eclipse of the sun February 3, 1935,1 and during the total eclipse of the sun of August 31, 1932,2 we now have data whi
AS a basis for the development of protective measures and prac·L tices, knowledge of the limits of dangerous electric shock is obviously important and this joint investigation at the College of Phy
DAILY character figure for radio transmission is obtained from the data of the short-wave transatlantic telephone circuits of the American Telephone and Telegraph Company.
HE three principal sources of airplane noise are the engine, the propeller, and air turbulence.
N studies of the inductive coordination of power and telephone systems from the noise standpoint, a knowledge of the magnitudes of the harmonic currents and voltages on the power circuits and of th
