Alexander Graham Bell's Telephone Prototype | The Genius Of Invention | Earth Science
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Alexander Graham Bell's Telephone Prototype | The Genius Of Invention | Earth Science
In the 1870's electricity was cutting edge technology and the challenge was on to build on the success of the Telegraph and carry the human voice. Like many other budding young inventors Bell and his assistant Watson picked up the gauntlet and devised the Liquid Telephone. Taken From The Genius Of Invention Subscribe for more awesome science ...
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