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 vii
... iron sheathings will be relegated to the Museum of Antiquities . Then , when a person wants to telegraph to a friend , he knows not where , he will call in an electro - magnetic voice , which will be heard loud by him who has the ...
... iron sheathings will be relegated to the Museum of Antiquities . Then , when a person wants to telegraph to a friend , he knows not where , he will call in an electro - magnetic voice , which will be heard loud by him who has the ...
Página 7
... iron so as to repeat the sound , and so on in unlimited succession . " It is not easy to say from these passages ( which are all we could find on the subject ) what plan Davy had in contemplation . In the first quotation he speaks of ...
... iron so as to repeat the sound , and so on in unlimited succession . " It is not easy to say from these passages ( which are all we could find on the subject ) what plan Davy had in contemplation . In the first quotation he speaks of ...
Página 38
... iron armature , or electro- magnet of the ordinary form , and which would therefore be independent of the Morse patent . sisting of movable coils of wire , suspended between the poles of a magnet , were constructed in the workshop of ...
... iron armature , or electro- magnet of the ordinary form , and which would therefore be independent of the Morse patent . sisting of movable coils of wire , suspended between the poles of a magnet , were constructed in the workshop of ...
Página 39
... iron rod under the waters of the river Huldee , 4200 feet wide , with batteries and delicate needle instruments in connection on each bank . Signals were passed , but " it was found that the instruments required the attention of skilful ...
... iron rod under the waters of the river Huldee , 4200 feet wide , with batteries and delicate needle instruments in connection on each bank . Signals were passed , but " it was found that the instruments required the attention of skilful ...
Página 47
... iron and that which has been so changed by contact with platinum that the strongest nitric acid fails to attack it . A genuine discovery of the sort would be of inestimable service in cheapening the tele- graph , cable rates would soon ...
... iron and that which has been so changed by contact with platinum that the strongest nitric acid fails to attack it . A genuine discovery of the sort would be of inestimable service in cheapening the tele- graph , cable rates would soon ...
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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