[32] Steinheil in the account he gives of his own telegraph, says, “Gauss mentions a communication from Humboldt, according to which Belancourt, in 1798, established a communication between Madrid and Aranjuez, a distance of 26 miles, by means of a wire, through which a Leyden jar used to be discharged, which was intended to be used as a telegraphic signal.”
[33] Report of the Academy of Industry, Paris, 1839.
[34] From the Repertory of Patent Inventions, No. lxvii. New Series, London, July, 1839.—Sealed, July 4th, 1888.
[35] A′, B′ and C′ are also, occasionally, common communicating wires.
[36] Mr. Bain means, by the deflected position of the coil, (when the current is passing,) its horizontal position, as shown in the [figure]. Its natural position, (when the current is broken,) is the elevation of the left hand end of the coil, in the direction of the arrow, carried up by the power of the spring, at the centre of the coil. This action of the spring is overcome, when the current is passing, to such a degree, as to bring the coil to the horizontal position as represented in the figure.
[37] It is absolutely necessary to the certain and accurate performance of the two machines, that their movements should be synchronical, or else a different figure, or signal, from that intended by the operator at the transmitting station, may be given at the receiving station.
[38] This contrivance for moving the paper is exactly similar to that in Prof. Morse’s first model of his telegraph, made in 1837, for the Patent Office.
[39] Daniell’s Introduction to Chemical Philosophy, page 580, 2d Edition, London, 1843
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