General and scholar. He worked on the establishment of an efficient wireless telegraphy, he developed the electrolytic detector (1900). His work increased the range of the Eiffel Tower transmitter from 400 to 6,000 km and dedicated French military telegraphy during the First World War. Among his other achievements, let us quote the replacement of the damped waves by sustained waves, construction of triode lamps, realization of transceiver stations for the navy and the colonies. Member of the Academy of Sciences in 1922