20 h 44 min, 13 févr. 1838 ans -
Description:
Samuel Morse sends his first public demonstration message over two miles of wire at Speedwell Ironworks in New Jersey. Morse also demonstrates his invention to the Franklin Institute and President Martin Van Buren in early 1838.[Ajouté au bande de temps:
Date:
20 h 44 min, 13 févr. 1838 ans
Maintenaint
~ Il y a 186 ans
