In 1825, Mr. Sturgeon, of London, discovered that a soft iron bar, surrounded by a helix of wire, through which a voltaic current is passed, becomes magnetized, and continues so as long as the current is passing through the wire.
In 1832, Baron Schilling constructed a model of a telegraph which was to give signals by the deflection of a needle to the right or left.
One great practical difficulty was still to be overcome, the resistance of the transmitting wire to the comparativon and substitute for itself a fresh and powerful one.
This is an essential condition to obtaining useful mechanical results from electricity itself, where a long circuit of conductors is used. — Prescott, History of the Electric Telegraph.
In 1832, Professor Morse began to devote his attention to the subject of telegraphy; and in that year, while on his passage home from Europe, invented the form of telegraph since so well known as Morse's.
A short line worked on his plan was set up in 1