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How was the telephone invented?

Voices Through Wire
How was the telephone invented?
Before the telephone, if you wanted to talk to someone far away, you had to write a letter and wait days — or weeks — fo

Before the telephone, if you wanted to talk to someone far away, you had to write a letter and wait days — or weeks — for an answer. But in the 1870s, a Scottish teacher named Alexander Graham Bell had a wild idea: what if you could send your actual voice through a wire, the way telegraph machines sent clicking codes?

Bell wasn't trying to invent the telephone at first. He was teaching deaf students how to speak, studying how sound waves — the invisible ripples your voice makes in the air — could be turned into something you could see or feel. He became obsessed with a question: if sound is just air wiggling, could you make electricity wiggle the same way?

How was this book?