Wednesday, 7 March 2018

Alexander Graham Bell

Alexander Graham Bell(March 3,1847,Edinburgh, Scotland-August 2,1922,Baddek, Nova Scotia) invented the telephone (with Thomas Watson) in 1876. Bell also improved Thomas Edison's phonograph. Bell invented the multiple telegraph (1875),the hydroairplane, the photo sensitive selenium cell (the photophone, a wireless phone, developed with Sumner Tainter ) and new techniques for teaching the deaf to speak. In 1882, Bell and his father - in - law,Gardiner Hubbard,bought  and re-organized the journal "Science." Bell,Hubbard and others founded the National Geographic Society in 1888; Bell was the President of the National Geographic Society from 1898 to 1903.

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