Alexander Graham Bell’s interests began to broaden and include the mysteries of telegraphy. He knew that telegraph messages are carried by means of a charged wire, and he wondered why the human voice could not be carried on the wire. The more he thought about this idea the more reasonable it seemed to him. So he began to try to make an instrument that would send the voice over the wire and catch its clear tones at the other end.
Alexander and his friend Thomas set to w