Lightning flashes and electric dashes, a volume of choice telegraphic literature, humor, fun, wit & wisdom (1877)
Johnston, W. J. (William John) · New York : W. J. Johnston · leaf 32
d in 1S19Oersted perfected the discovery of electro-magnetism.Ronalds constructed an electric semaphore, whichmade signals at a distance of eight miles, in 1S16. In1S25 Sturgeon invented the electro-magnet. In 1S30Professor Henry applied Schweigers coil to Sturgeonsmagnet, and wonderfully increased… … morses first nECOKDING TELEGRAnl. cupied his attention for some time. Finally,in November, 1S35, he completed a rude tel-egraphic instriuiKfnt—the first recording ai>-paratus—which is now in the library of hiscountry-seat near Poughkeepsie. It embodiedthe mechanical principles of those now in…
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