“But in the apparatus for observation, the observer looks into the spy-glass, and writes up the kind and results of the variations of the magnetic needle. In order to have a control of the recorder, let there be a good number of spy-glasses directed towards the same mirror, in which observers may watch independently of each other. Suppose that five variations of the magnetic needle signifies a letter. L denotes a variation to the left, and R to the right. Then, might r r r r r denote A; r r r r l denote B; r r r l r denote C; r r l r r denote D; and so on. In the whole, we obtain, by the different arrangements of the five, which are made with the two letters, R and L, 32 different telegraphic signs, which may answer for letters and numbers, and of which we can select those where the most changes are introduced between _r_ and _l_, as the most common letters, in order, in the best possible manner, to notice the constant variations of the magnetic needle.” The following would be the alphabetical signs, as arranged from the above directions: A r r r r r | I or Y l l r l l | R r r r l l B r r r r l | K l r r r l | S or Z r r l r l C r r r l r | L r l r r r | T l l r l r D r r l r r | M r r l l l | U r l l l r E r l r l r | N l l l l l | V l r r l l F l r r r r | O l r l l l | W l l l l r G or J l r l r r | P l r l r l | H r l r r l | Q l l r r r | _Numerals._ 1 r l l l l | 6 r l l r r 2 r r l l r | 7 l l l r l 3 r l r l l | 8 l l r r l 4 r l l r l | 9 l r r l r 5 l l l r r | 0 l r l l r It will be seen, that, by representing the letters and numerals with these variously combined deflections of the needle, words and sentences may be transmitted. At the end of each letter there is a suspension of the action of the bar for a short time, and at the end of a word, a still longer pause. This plan of an electric telegraph was tried for a distance of one mile and a quarter, in Göttingen. Of its further success, we are not informed. _Experiment of Messrs. Taquin & Ettieyhausen._[28] “Messrs. Taquin and Ettieyhausen made experiments with a telegraphic line over two streets in Vienna, 1836. The wires passed through the air and under the ground of the Botanic garden.” No other account appears to have been given of their experiments than that quoted above. [28] From the Polytechnic Central Journal, 1838. _Electro Magnetic Printing Telegraph, invented by Alfred Vail, September, 1837._