Bell's first long-distance telephone call

Bildnummer 11827533
Bell's first long-distance telephone call
First long-distance telephone call. Alexander Graham Bell (1847-1922,centre) performing the first long-distance telephone call in 1876. The conversation took place between Boston,Massachusetts,USA,and the town of Salem,some 22 kilometres away. Bell was a speech therapist who worked with the deaf. His experiments on the transmission of sound led to his designs for the multiple telegraph and the telephone. Bell won a lengthy legal battle with Elisha Gray,who filed a similar telephone patent on the same day. After this he became a rich man,and founded the company that became AT&T. Illustration taken from La Telegraphie Historique (1888),by Alexis Belloc
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Terry, Sheila
Bildgröße: 4000 px × 3004 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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