By Victoria Sherrow

ISBN-10: 1575053012

ISBN-13: 9781575053011

ISBN-10: 1575054604

ISBN-13: 9781575054605

ISBN-10: 1575055333

ISBN-13: 9781575055336

Growing to be up, Alexander Graham Bell used to be thinking about track, speech, and sounds. He labored challenging to invent issues that may not just aid people with impaired listening to, but in addition convey humans jointly in new and distinctive methods. What he did not recognize used to be that his easy idea--to aid humans communicate--would switch the realm whilst he invented the phone.

Show description

Read or Download Alexander Graham Bell (On My Own Biographies) PDF

Best nature & how it works books

Download PDF by Michael J Bradley: Pioneers in mathematics, Ancient times to 1300 The birth of

Profiles 10 participants from Greece, India, Arabia, and medieval Italy through the period of time of seven-hundred BCE to CE 1300 as representatives of the varied students who contributed to the sphere of arithmetic.

Get Stick Insects: Masters of Defense (Insect World) PDF

Beware of those masters of defense--stick bugs! Their mystery weapon is having the ability to cover in undeniable sight. to guard themselves from predators, they've got constructed lengthy, slim our bodies. They combination correct in to the branches they continue to exist. a few stick bugs also have additional growths that seem like leaves for extra camouflage.

Midnight on the Moon by Mary Pope Osborne PDF

The number 1 bestselling bankruptcy publication sequence of all time celebrates 25 years with new covers and a brand new, easy-to-use numbering process! 3 …two…one…BLAST OFF! The Magic Tree condo whisks Jack and Annie off to the moon—and the long run. Their venture? to discover the final "M" factor that may loose Morgan from the spell.

The Mystery of the Ghosts of Flight 401 - download pdf or read online

Why could the ghosts of 2 crewmen who died in a 1972 air crash within the Everglades seem to different airplane flying an identical path? This e-book tells the tales of the folks who think they've got met those ghosts of the airlines!

Extra resources for Alexander Graham Bell (On My Own Biographies)

Sample text

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.

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.

He asked. “Don’t change a thing. ” Watson said the transmitter had jammed. He had tried to f ix it. He had moved the part that was stuck, and a “twang” sound came over the wire. 39 40 Aleck and Watson tried sending the sound over and over again. It worked. Quickly, Aleck drew a picture. It showed his new design for the talking machine. Now he knew it was possible for voices to travel on wires. Aleck and Watson decided to spend all their time on the talking machine. Aleck stopped teaching for a while.

Download PDF sample

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

by John

Rated 4.31 of 5 – based on 32 votes