Eugène Édouard Désiré Branly (23 October1844 - 24 March1940) was a French physicist. He is primarily known for his early involvement in wireless telegraphy and his invention of the Branly coherer around 1890. This was used by, amongst others, Guglielmo Marconi, in his early experiments. October 23 is the 296th day of the year (297th in leap years) in the Gregorian Calendar, with 69 days remaining. ... 1844 was a leap year starting on Monday (see link for calendar). ... March 24 is the 83rd day of the year in the Gregorian Calendar (84th in Leap years). ... 1940 (MCMXL) was a leap year starting on Monday (link will take you to calendar). ... Wireless telegraphy is the practice of remote writing (see telegraphy) without the wires normally involved in an electrical telegraph. ... A coherer (or, sometimes, receiver) is an early form of detector in wireless telegraphy. ... Guglielmo Marconi Guglielmo Marconi, GCVO (25 April 1874 – 20 July 1937) was an Italian electrical engineer and Nobel laureate, known for the development of a practical wireless telegraphy system commonly known as the radio. Marconi was President of the Accademia dItalia and a member of the Fascist Grand Council...
Branly is best known by his researches concerning radio-conductors, and particularly by his so-called coherer.
Branly has given the name of radio-conductors to bodies which, like filings, can be made conductors or non-conductors at will.
Among Dr. Branly's other researches have been those relating to the effect of ultra violet light upon positively and negatively charged bodies (1890-93), electrical radio-conductivity of gases (1894), etc. It may be noted germ of the "antennae", employed particularly in long distance telegraphy, may be found in his papers published in 1891.
Although little known abroad, Edouard Eugène Désiré Branly is considered in France as being the inventor of wireless telegraphy, and his name is a symbol of the alliance of science and technology.
Branly, a physics professor at the Catholic Institute in Paris, first encountered telegraphy indirectly via the intermediary of one of his professors at the Sorbonne, Paul Desains, who had made attempts at telegraphy using underwater or terrestrial means.
Like Branly, he was extremely interested in the links between physiology and electricity and was an active member of a Society for Psychic Research, which led him into research areas far removed from a wireless telegraphy project.
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