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Désiré Eugène Édouard BRANLY



 Amiens  23.October.1844-Paris 24.March.1940 
Detector of electromagnetic waves  (coherer)
In 1888 with few resources in its laboratory of the Catholic Institute in Paris studying the characteristics of certain metals exposed to electromagnetic waves, and discovers the radio conductors "tube" à limaille ' "(see photo) that reveal the presence of electromagnetic waves that will called 'Cohéreur' Coherer this important detector although rudimentary Marconi allow testing of the transmission of wireless telegraphy.