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action apparatus appears applied arrangement attracted battery bodies called carried cause charge circuit cloth coil communication complete conducting connected constructed containing copper correspondence course Davy 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 inches indicated insulated interesting invention iron Journal keys known length letter light London machine magnetic means Mechanics ment metallic nature needle observed obtained original pair Paris pass patent person piece pile placed plates pole positive practical present principle produced Professor proposed published Railway received reference result Royal says shock showed signals Society soon spark suggested surface tion tube turn wire zinc
546 ページ - 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.
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...
547 ページ - 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....