Referat Alexander Graham Bell - Referat la Engleza - Engleza

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Referat Alexander Graham Bell

Materie: Engleza / Nivel: gimnaziu
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Alexander Graham Bell
Alexander Graham Bell was born on March 3, 1847 in Edinburgh, Scotland. Bell is best known for his invention of the telephone. Many inventors had been working on the idea of sending human speech by wire, but Bell was the first to succeed.
The invention of the telephone grew out of improvements Bell had made to the telegraph. He had developed the "harmonic telegraph" which could send more than one message at a time over a single telegraph wire. Bell reasoned that it would be possible to pick up all the sounds of the human voice using an adaptation of the "harmonic telegraph." In 1875, along with his assistant Thomas A. Watson, Bell constructed instruments that transmitted recognizable voice-like sounds.
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