Telegraph

By Aryan Sawlani
  • Claude chappe invents non electrical telegraph

    Claude chappe invents non electrical telegraph

  • Crude telegraph was invented

  • Electromagnet was invented by William Strurgeon (which led to inventing the electric telegraph)

    Electromagnet was invented by William Strurgeon (which led to inventing the electric telegraph)

  • Joseph Henry demonstrated long distant communication with electromagnet

    Joseph Henry demonstrated long distant communication with electromagnet

  • Electrical telegraph sent its first message

    Electrical telegraph sent its first message

  • Period: to

    Telegraph was used for long distance communication until telephone was released

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