A History of Electric Telegraphy, to the Year 1837 |
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A History of Electric Telegraphy, to the Year 1837 (1884) John Joseph Fahie No preview available - 2008 |
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action apparatus appears applied arrangement attracted battery called carried cause charge circuit cloth coil communication complete conducting connected constructed containing Cooke copper correspondence course Davy Davy's deflected described direction discovery distance doubt edition effect electric telegraph electro-magnet employed Engineers exhibited experiments fact feet force four galvanic give given glass hand Henry idea illustrations important inches indicated interest invention iron Journal keys known length letter light London machine magnet means Mechanics metallic Morse nature needle observed obtained original pair Paris passing patent persons piece pile placed plates pole positive practical present principle produced Professor proposed published Railway received reference says scientific signals Society soon success sufficient suggested tion turn Wheatstone wire zinc
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Page 546 - It is no disparagement to the many excellent publications we refer to, to say that in our opinion this little pocket-book of Hurst's is the very best of them all, without any exception.
Page 64 - 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.
Page 298 - 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...
Page 547 - Construction of Roofs — Section V, Construction of Domes and Cupolas — Section VI. Construction of Partitions — Section VII. Scaffolds, Staging, and Gantries— Section VIII. Construction of Centres for Bridges — Section IX. Coffer-dams, Shoring, and Strutting— Section X. Wooden Bridges and Viaducts — Section XI. Joints, Straps, and other Fastenings — Section XII. Timber. Our Factories, Workshops, and Warehouses : their Sanitary and Fire-Resisting Arrangements. By BH THWAITE, Assoc....