A History of Wireless Telegraphy: Including Some Bare-wire Proposals for Subaqueous TelegraphsBlackwood, 1901 - 348 páginas |
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Página 2
... action of his telegraph whilst the two conducting cords were each interrupted by water contained in wooden tubs . The signals appeared just as well as if no water had been interposed , but they ceased as soon as the water in the tubs ...
... action of his telegraph whilst the two conducting cords were each interrupted by water contained in wooden tubs . The signals appeared just as well as if no water had been interposed , but they ceased as soon as the water in the tubs ...
Página 9
... action it is totally unconnected with electricity , magnetism , galvanism , or any other subtle species of matter ; and although the communication from place to place is instan- taneous , and capable of ringing a bell , firing a gun ...
... action it is totally unconnected with electricity , magnetism , galvanism , or any other subtle species of matter ; and although the communication from place to place is instan- taneous , and capable of ringing a bell , firing a gun ...
Página 21
... action of the water . The wire must not be composed of parts joined by soldering , but welded together ; this welding can be performed by elec- tricity . In order to prevent the action of water on the wire , a button of a more oxidable ...
... action of the water . The wire must not be composed of parts joined by soldering , but welded together ; this welding can be performed by elec- tricity . In order to prevent the action of water on the wire , a button of a more oxidable ...
Página 23
... action of the sea - water was evidently borrowed from Sir Humphry Davy's proposal of 1824 for the protection of the copper sheathing of ships by strips of zinc ; while the further suggestion , on which he insists so much , of welding ...
... action of the sea - water was evidently borrowed from Sir Humphry Davy's proposal of 1824 for the protection of the copper sheathing of ships by strips of zinc ; while the further suggestion , on which he insists so much , of welding ...
Página 51
... action of the water or moisture with which they are in contact . If at one extremity the wires be attached respectively to the two ends of the coil of an electro - magnet or other telegraphic apparatus , it will be found that the ...
... action of the water or moisture with which they are in contact . If at one extremity the wires be attached respectively to the two ends of the coil of an electro - magnet or other telegraphic apparatus , it will be found that 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, 1838-1899: Including Some Bare-wire ... John Joseph Fahie Visualização integral - 1900 |
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 Cheap Edition circuit communication condenser conducting conductor connected copper wire Crown 8vo Daniell cell Demy 8vo detector diameter discharge distance disturbance Dundee earth effect Elec electric waves electrical oscillations Electrician electro-magnetic employed ether ethereal waves exciter experiments Fcap feet filings Flat Holm galvanometer gutta-percha Hertz Hertzian waves Illustrations inch increase induction coil iron Leclanché cells length Leyden jar light lighthouse Lindsay magnetic Marconi means ments messages metallic method metres microphone miles Morse Muckle Flugga needle obtained ohms ordinary paper parallel pass patent plates poles Portraits possible Post 8vo practical produced Prof Professor receiving instrument reflector relay resistance Scotland Second Edition secondary sending sensitive tube ship shore shown signals space spark-gap sparks station surface telegraph telephone terminals tion transmitting trembler tricity vertical wire vibrations Willoughby Smith wire wireless telegraphy yards
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