Alexander Graham Bell (On My Own Biographies) - download pdf or read online

By Victoria Sherrow

ISBN-10: 1575053012

ISBN-13: 9781575053011

ISBN-10: 1575054604

ISBN-13: 9781575054605

ISBN-10: 1575055333

ISBN-13: 9781575055336

Becoming up, Alexander Graham Bell used to be enthusiastic about song, speech, and sounds. He labored challenging to invent issues that might not just aid people with impaired listening to, but in addition convey humans jointly in new and exact methods. What he did not understand was once that his easy idea--to support humans communicate--would swap the realm whilst he invented the phone.

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March 10, 1876 Aleck and Watson were hard at work. Watson was downstairs working on a receiver. Aleck was upstairs. He was working with the transmitter. 42 A pile of tools, wires, and battery acid surrounded him. Suddenly, Aleck spilled some acid. The acid burned. Aleck cried out, “Mr. Watson, come here! ” He forgot that Watson was too far away to hear him. 43 To Aleck’s surprise, Watson came running upstairs. He burst into the room. “Mr. ” he said. ” Aleck forgot all about his burns. He and Watson spent the night talking on their machine.

Aleck hoped to marry Mabel. Aleck kept working on the telegraph. But he also had a new idea. 34 35 Aleck wanted to make a machine that let people talk over wires. He knew that air changes when sounds move through it. Vibrations make waves of sound in the air. Maybe sound waves could also change an electrical current. If they could, spoken words could be sent over a wire. Aleck and Watson began to work on a talking machine, too. For months, they tried connecting wires in different ways. They built new kinds of transmitters.

Some nights, they did not sleep. Mabel Hubbard joked about Aleck’s late nights working in the shop. One day she drew a picture of him with an owl’s head! Owls stayed awake at night, too. By this time, Aleck and Mabel were in love. Aleck hoped to marry Mabel. Aleck kept working on the telegraph. But he also had a new idea. 34 35 Aleck wanted to make a machine that let people talk over wires. He knew that air changes when sounds move through it. Vibrations make waves of sound in the air. Maybe sound waves could also change an electrical current.

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Alexander Graham Bell (On My Own Biographies) by Victoria Sherrow


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