Three major revolutions occurred in the world of communications during the 19th century—the telegraph, the telephone and the wireless (radio). We call the first two “wired” and the third, “wireless” communication. Although the telegraph is no longer important for the 21st century, and we cancelled the system in India and other parts of the world in 2013, we should know its history.
Experiments in Europe, particularly by Michael Faraday in England, Alessandro Volta in Italy, and Georg Ohm in Germany, showed that electricity was a natural phenomenon and that it could be produced on a fairly large scale, stored, and transported to different parts of the country of its origin or even beyond its borders. It was also demonstrated by several scientists that electricity could carry information through wired and wireless means—the radio waves.
In 1840, Samuel F. B. Morse (1791–1872), American inventor and artist, patented a telegraphic system by which messages could be sent by electric wire ...