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 15
... cells a light which burned steadily for a lengthened period . " His acquaintance with languages was extraordinary , and almost equalled that of his famous contemporary , the Cardinal Mezzofanti . In 1828 he began the compilation of a ...
... cells a light which burned steadily for a lengthened period . " His acquaintance with languages was extraordinary , and almost equalled that of his famous contemporary , the Cardinal Mezzofanti . In 1828 he began the compilation of a ...
Página 27
... cells he would make a few momen- tary contacts , reversing the connections a few times so as to produce right and left deflections of the galvano- meter needle . Then he would return and compare the deflections of the needle which they ...
... cells he would make a few momen- tary contacts , reversing the connections a few times so as to produce right and left deflections of the galvano- meter needle . Then he would return and compare the deflections of the needle which they ...
Página 39
... cells of the nitric acid and platinum form ) , and therefore prohibitively expensive . Although for practical purposes he soon abandoned the idea of signalling across rivers with naked wires , and with- out any wires at all , O ...
... cells of the nitric acid and platinum form ) , and therefore prohibitively expensive . Although for practical purposes he soon abandoned the idea of signalling across rivers with naked wires , and with- out any wires at all , O ...
Página 43
... cell , and you see how they retain the charge ; in fact , they will go on gradually discharging for several minutes . through the small resistance of the gold - leaf instrument . now do the same with a tub of salt water , and the result ...
... cell , and you see how they retain the charge ; in fact , they will go on gradually discharging for several minutes . through the small resistance of the gold - leaf instrument . now do the same with a tub of salt water , and the result ...
Página 44
... cells , and the other of low tension from a single cell of small internal resistance , a fault equivalent to the exposure of a mile of No. 16 wire in sea - water will annihilate all appreciable effects on the galvanometer when using the ...
... cells , and the other of low tension from a single cell of small internal resistance , a fault equivalent to the exposure of a mile of No. 16 wire in sea - water will annihilate all appreciable effects on the galvanometer when using the ...
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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