Telegraph By Aryan Sawlani Jan 1, 1794 Claude chappe invents non electrical telegraph Jan 1, 1809 Crude telegraph was invented Aug 30, 1825 Electromagnet was invented by William Strurgeon (which led to inventing the electric telegraph) Jan 1, 1830 Joseph Henry demonstrated long distant communication with electromagnet May 1, 1844 Electrical telegraph sent its first message Period: May 1, 1844 to Jan 1, 1877 Telegraph was used for long distance communication until telephone was released
