Emil Adolf Oscar Fröhlich ( German: Emil Adolf Oskar Frölich , November 23, 1843 , Bern - July 6, 1909 , Berlin ) - German electrical engineer, specialist in the field of telegraphy, electrochemistry, he headed the Siemens and Halske laboratory in Berlin . He was engaged in the study of the temperature of the Earth, celestial space and the Sun, of electrical oscillations, the theory of dynamos, the measurement of electricity, etc.
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