mp3 player
The Telegraph
it is an innovative invention!!
the invention that led up to the gas mask was a cloth in front of your face
metronome
The scientific finding that led to the invention of the first camera was that light could catalyze a chemical reaction.
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The Invention of the Telegraph by Joseph Henry in 1831 led to the invention of the phone.
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the growth of cotton plantations and the invention of the cotton gin.