Science inventions

a musician or a teacher of deaf people. )
2) What books did he read? (He read all the books about sound that he could find. )
3) What did he become interested in at twenty five years? (At twenty five Alexander became interested in finding a way to send human voice through an electric wire. )
4) What machine did A. G. Bell and T. Watson try to built? (They tried to build a machine that people could use to talk to one another over long distances. ) Did they manage to do it? (Yes, they did. )
5) When was the first telephone line built? (The first telephone line was built in Germany in 1877. )
Telephone.
Alexander Graham Bell never planned to be an inventor, he wanted to be a musician or a teacher of deaf people. Alexanders mother was a painter and a musician. His father was a well-known teacher of deaf people.
When Alexander was only sixteen, he became a teacher in boys school in Scotland. He liked teaching there, but he still wanted to become a teacher of deaf people as his father.
He read all the books about sound that he could find and started to work on some of his own experiments.
At twenty five Alexander became interested in finding a way to send human voice through an electric wire. The parents of his pupils contributed money for the equipment. He found an assistant, Tom Watson, who worked in an electrical shop. For two years Tom and Alexander were working together to build a machine that people could use to talk to one another over long distances. After two years, the two young men were becoming discouraged. Then, one day, when they were working on a new transmitter Alexander spilled some acid on himself. Tom Watson, who was alone in another room, heard a voice. The voice was coming through a wire to a receiver on th