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16 h 24 min, 9 sept. 1837 ans -

Description:

David Alter of Pennsylvania develops the first American electrical telegraph, but he never develops the idea into a practical system.

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ByWilliam Ward
30 oct. 2018
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147

Date:

16 h 24 min, 9 sept. 1837 ans
Maintenaint
~ Il y a 186 ans
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