Alexander Graham Bell(1847-1922)
An American citizen who was born in Scotland. His greatest invention was the telephone. On June 2, 1875, he was experimenting with the sending of several telegraph messages over the same wire at the same time. His assistant Thomas Watson happen to pluck a steel reed of the receiving set, which caused a swanging sound in the sending set. This was the birth of telephone. He also invented the audiometer, flat and cylindrical wax recorders for phonographs, hydrofoils to make ship go faster and kites capable of lifting people.
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