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Graham Bell's Telephone


On March 10, 1876, Graham Bell made the first phone call to his assistant, Thomas Watson, from one room to another.

The message was:

Mr Watson, please come here. I want you!


Bell had spilt some acid on his trousers and needed help from his assistant.

The genius of Graham Bell was to understand that sound waves which make up human speech, could be reproduced in a continuous, but undulating current.


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