History, Theory, and Practice of the Electric Telegraph |
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acid action alphabet apparatus armature arranged Atlantic Cable Atlantic Telegraph Company atmosphere atmospheric electricity aurora borealis Bain battery Boston cause chemical circuit coil communication conducting conducting-wires conductor connected constructed copper copper wire cylinder deflected despatch dial diameter direction distance dots earth effects electric current electric telegraph electro-magnet electro-motive force employed equal experiments galvanic galvanometer glass ground Grove's gutta-percha hundred inches instrument insulated intensity invention iron wire J. B. Stearns letters lever London magnetized needle manner means ment metal Morse Morse's NEWFOUNDLAND TO VALENTIA nitric acid observed obtained operator paper particles pass patent phenomena plate platinum polar pole positive posts produced received relay resistance rheostat Sauty signals station Steinheil storm sulphuric acid surface tele Telegraph Company telegraph lines tion transmission transmitted tricity type-wheel VALENTIA TO NEWFOUNDLAND voltaic Wheatstone wire words York zinc