A History of Electric Telegraphy, to the Year 1837E. & F. N. Spon, 1884 - 542 Seiten |
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Seite xiv
... circuit in telegraphy was clearly and intelligently suggested by an Englishman long before Steinheil made his accidental discovery of it ( p . 345 ) ; and that not Cooke and Wheatstone , nor Morse , but Henry in America and Edward Davy ...
... circuit in telegraphy was clearly and intelligently suggested by an Englishman long before Steinheil made his accidental discovery of it ( p . 345 ) ; and that not Cooke and Wheatstone , nor Morse , but Henry in America and Edward Davy ...
Seite 46
... circuit , the function of which , however , was not then suspected . While Gray and Wheeler were pursuing their investigations in England , Dufay , of the Academy of Sciences , and Intendant of the Royal Botanic Gardens , was actively ...
... circuit , the function of which , however , was not then suspected . While Gray and Wheeler were pursuing their investigations in England , Dufay , of the Academy of Sciences , and Intendant of the Royal Botanic Gardens , was actively ...
Seite 59
... circuit . * The Abbé Nollet , whose name is famous in the annals of this period , had meanwhile taken up the subject in France . He first , April 1746 , transmitted the shock of a Leyden jar through a chain of 180 of the Royal Guards at ...
... circuit . * The Abbé Nollet , whose name is famous in the annals of this period , had meanwhile taken up the subject in France . He first , April 1746 , transmitted the shock of a Leyden jar through a chain of 180 of the Royal Guards at ...
Seite 60
... circuits composed of 2000 toises ( 12,780 feet ) of iron wire laid along the ground , and , although some of the wire ... circuit to be completed , he could not distinguish any interval ( so short was it ) between the spark at the jar ...
... circuits composed of 2000 toises ( 12,780 feet ) of iron wire laid along the ground , and , although some of the wire ... circuit to be completed , he could not distinguish any interval ( so short was it ) between the spark at the jar ...
Seite 61
... circuit , he says , is always formed through the best conductors , though the length be ever so great- a most sagacious observation for the man and the time . The first trials took place on the 14th and 18th July , 1747 , on a wire ...
... circuit , he says , is always formed through the best conductors , though the length be ever so great- a most sagacious observation for the man and the time . The first trials took place on the 14th and 18th July , 1747 , on a wire ...
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A History of Electric Telegraphy, to the Year 1837 (1884) John Joseph Fahie Keine Leseprobe verfügbar - 2008 |
Häufige Begriffe und Wortgruppen
action alarum alphabet apparatus appears applied arrangement attracted Baron Schilling battery 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 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 P. L. SIMMONDS 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 Salvá says scientific shock signals Society Sömmerring spark tele tion transmitted Treatise tricity tube voltaic voltaic pile zinc
Beliebte Passagen
Seite 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.
Seite 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.
Seite 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...
Seite 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....