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action alarum alphabet apparatus appears applied arrangement attracted Baron Schilling battery charge circuit cloth coil communication conducting wire conductor connected constructed contrivance Cooke and Wheatstone copper copper wire correspondence crown 8vo Daniel Schwenter Davy's deflected described direction disc discovery distance edition Edward Davy effect elec electric current electric telegraph Electrician electro-magnet electrometer employed Engineers excited Exeter Hall exhibited experiments feet galvanic galvanometer glass honour hydrogen inches insulated invention inventor iron Journal keys letter Leyden jar line wires London machine magnetic magnetic needle magnetised means ment mercury metallic Morse Munich negative observed oxydation pair paper Paris patent philosophers piece pile placed plates pole positive practical produced Professor Henry proposed Railway return wire Ronalds Royal S. F. B. Morse Salva says scientific semaphore shock signals Society spark tele tion transmitted Treatise tricity tube voltaic voltaic pile zinc
64 ページ - Spirits, at the same time, are to be fired by a spark sent from side to side through the river without any other conductor than the water ; an experiment which we some time since performed to the amazement of many.
298 ページ - Certain effects of the induction of electrical currents have already been recognised and described : as those of magnetization ; Ampere's experiments of bringing a copper disc near to a flat spiral; his repetition with electromagnets of Arago's extraordinary experiments, and perhaps a few others. Still it appeared unlikely that these could be all the effects which induction by currents could produce; especially as, upon dispensing with iron...