A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire Proposals for Subaqueous TelegraphsDodd, Mead & Company, 1900 - 325 páginas |
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Página 5
... effect is proportional , not to the distance of the point of excitation , but to the square of this distance ; so that , at the distance of 50 feet , only exceedingly small effects can be produced by the most powerful electrical effect ...
... effect is proportional , not to the distance of the point of excitation , but to the square of this distance ; so that , at the distance of 50 feet , only exceedingly small effects can be produced by the most powerful electrical effect ...
Página 15
... effects may be translated into speech -and I have no doubt he held in his hand the modern system of the telegraph , but it needed a wiser man than he to turn it to practical use . He also produced from gal- vanic cells a light which ...
... effects may be translated into speech -and I have no doubt he held in his hand the modern system of the telegraph , but it needed a wiser man than he to turn it to practical use . He also produced from gal- vanic cells a light which ...
Página 16
... effects will be exhibited , besides a number of subordinate experiments , including the discoveries of Sir Humphry Davy . " In March 1841 , Lindsay was appointed teacher in the 1 On a previous occasion ( July 1829 ) he was presented ...
... effects will be exhibited , besides a number of subordinate experiments , including the discoveries of Sir Humphry Davy . " In March 1841 , Lindsay was appointed teacher in the 1 On a previous occasion ( July 1829 ) he was presented ...
Página 21
... effect the following hints should be attended to : The wire should be of pure copper , as otherwise it would be injured by the electro - chemical action of the water . The wire must not be composed of parts joined by soldering , but ...
... effect the following hints should be attended to : The wire should be of pure copper , as otherwise it would be injured by the electro - chemical action of the water . The wire must not be composed of parts joined by soldering , but ...
Página 41
... effect of polar- isation ( so - called ) , or , as I am inclined to suppose , from electrisation of the successive strata of water surrounding the wire , a long wire , brought to a state of low electrical tension , will retain that ...
... effect of polar- isation ( so - called ) , or , as I am inclined to suppose , from electrisation of the successive strata of water surrounding the wire , a long wire , brought to a state of low electrical tension , will retain that ...
Outras edições - Ver tudo
A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire ... John Joseph Fahie Visualização integral - 1899 |
A History of Wireless Telegraphy: Including Some Bare-wire Proposals for ... John Joseph Fahie Visualização integral - 1901 |
A History of Wireless Telegraphy, 1838-1899: Including Some Bare-wire ... John Joseph Fahie Visualização integral - 1900 |
Palavras e frases frequentes
apparatus arrangement battery cable cells centimetres charged Cheaper Edition circuit communication condensers conducting conductor connected copper wire Crown 8vo Daniell cell Demy 8vo detector diameter discharge distance disturbance Dundee earth effect Elec electric current electric waves electrical oscillations Electrician electro-magnetic employed ether ethereal waves exciter experiments Fcap feet filings Flat Holm galvanometer gutta-percha Hertz Illustrations inch increase induction coil Inst iron Leclanché cells length Leyden jar light lighthouse Lindsay magnetic Marconi means ments messages metallic method miles Morse Muckle Flugga needle obtained ohms ordinary paper parallel pass plates poles Portrait possible Post 8vo practical Preece produced Prof Professor receiving instrument reflector relay resistance river Scotland Second Edition secondary sensitive tube shore signals space sparks station surface tele telegraph telephone terminals tion transmitting trembler tricity University of Edinburgh vibrations vols Willoughby Smith wire wireless telegraphy yards
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