A History of Wireless Telegraphy: Including Some Bare-wire Proposals for Subaqueous TelegraphsBlackwood, 1901 - 348 páginas |
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Página 2
... caused by electricity going from one point charged positively to another point charged negatively , as Bertolon has shown in his Élec- tricité des Météores ' ( vol . i . p . 273 ) , one does not even want a cable to send across the sea ...
... caused by electricity going from one point charged positively to another point charged negatively , as Bertolon has shown in his Élec- tricité des Météores ' ( vol . i . p . 273 ) , one does not even want a cable to send across the sea ...
Página 4
... cause a visible deflection of the bar . This is a hitherto unobserved fact , and may be classed amongst the most extraordinary phenomena that science has revealed to us . It only holds good , however , for small distances ; and it must ...
... cause a visible deflection of the bar . This is a hitherto unobserved fact , and may be classed amongst the most extraordinary phenomena that science has revealed to us . It only holds good , however , for small distances ; and it must ...
Página 7
... cause sympathetic vibrations in a unison - sounding apparatus at a distance , this last vibra- tion causing a renewing wire to dip2 and magnetise soft iron so as to repeat the sound , and so on in unlimited succession . " It is not easy ...
... cause sympathetic vibrations in a unison - sounding apparatus at a distance , this last vibra- tion causing a renewing wire to dip2 and magnetise soft iron so as to repeat the sound , and so on in unlimited succession . " It is not easy ...
Página 8
... causing a renewing wire to dip . " However this may be , Davy's idea deserves at least this short notice in a history of early attempts at wireless telegraphy ; for , although hardly possible of realisation with the apparatus at his ...
... causing a renewing wire to dip . " However this may be , Davy's idea deserves at least this short notice in a history of early attempts at wireless telegraphy ; for , although hardly possible of realisation with the apparatus at his ...
Página 11
... cause the water itself to conduct the electricity across . The experiment , however , was deferred till I arrived in Washington ; and on December 16 , 1842 , I tested my arrangement across the canal , and with success . The simple fact ...
... cause the water itself to conduct the electricity across . The experiment , however , was deferred till I arrived in Washington ; and on December 16 , 1842 , I tested my arrangement across the canal , and with success . The simple fact ...
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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