The receiver, to which we must now pay attention, has two arms DD’, and two rods FF’, corresponding in size with AA’ and CC’ of the transmitter. The arms DD’ are moved up and down by the coils TT’ which turn on centres in circular spaces at the bend of the magnets MM’. The position of these coils relatively to the magnets depend on the strength of the currents coming from the transmitting station. Each coil strains at a small spiral spring until it has reached the position in which its electric force is balanced by the retarding influence of the spring. One of the cleverest things in the telautograph is the adjustment of these coils so that they shall follow faithfully the motions of the rods LL’ in the transmitter. [Illustration: _By kind permission of_] [_The Telautograph Co._ _An example of the work done by the Telautograph. The upper sketch shows a design drawn on the transmitter; the lower is the same design as reproduced by the receiving instrument, many miles distant._] We are now able to trace the actions of sending a message. The sender first presses the button E to call the attention of some one at the receiving station to the fact that a message is coming, either on the telephone or on the paper. It should be remarked, by-the-bye, that the same wires serve for both telephone and telautograph, the unhooking of the telephone throwing the telautograph out of connection for the time. He then presses the lever S towards the left, bringing his transmitter into connection with the distant receiver, and also moving a fresh length of paper on to the platform P. With his pencil he writes his message, pressing firmly on the paper, so that the platform may bear down against an electric contact, X. As the pencil moves about the paper the arms CC’ are constantly changing their angles, and the brushes ZZ’ are passing along the segments of the rheostats. Currents flow in varying intensity away to the coils TT’ and work the arms DD’, the wires FF’, and the pen, a tiny glass tube. In the perfectly regulated telautograph the arms AA’ and the arms DD’ will move in unison, and consequently the position of the pen must be the same from moment to moment as that of the pencil.