The telegraph stands as one of the most groundbreaking inventions in human history. Before its arrival, communication was painfully slow, relying on messengers, letters, or physical travel. The ...

All day yesterday the telegraph and cable companies suffered from the interference with their wires by electrical disturbances, which they set down to the existence of special activity of the ...

which should be able to transmit several times as many dispatches per hour over a telegraph wire as can be done by the Morse instrument. The theory upon which all the experimenters in this ...