A complete system of signalling by night and day on the Morse system is worked by the police.
The relay itself served to actuate a Morse printing telegraph by means of a local battery.
Very briefly stated, his method consists in sending out a group of wave trains at certain irregular but assigned intervals of time to constitute the simplest signal equivalent to a dot in the Morse code, and a sequence of such trains, say three following one another, to constitute the dash on the Morse code.
To send signals the continuous or nearly continuous train of waves must be cut up into Morse signals by a key, and these are then heard as audible signals in the telephone.
The year 1827 marks the revival of Morse's interest in electricity.