The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 páginas |
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Página ix
... Telegraph 13. Pith - ball Electroscopes 14. Lomond's Telegraph 15. Reusser's Telégraph 16. Don Silva's and Betancourt's Telegraphs . 17. Cavallo's Telegraph 18. Ronald's Telegraph . III . TELEGRAPHS BY VOLTAIC ELECTRICITY . § 19 ...
... Telegraph 13. Pith - ball Electroscopes 14. Lomond's Telegraph 15. Reusser's Telégraph 16. Don Silva's and Betancourt's Telegraphs . 17. Cavallo's Telegraph 18. Ronald's Telegraph . III . TELEGRAPHS BY VOLTAIC ELECTRICITY . § 19 ...
Página x
... Telegraph 26 magnetic Telegraph 31. Sturgeon's Discovery of the Electro - magnet 32. Schilling's Telegraph 33. Faraday's Discoveries . 34. Gauss and Weber's Telegraph . 35. Steinheil's Telegraph 27 28 Morse's Invention of an Electro- 29 ...
... Telegraph 26 magnetic Telegraph 31. Sturgeon's Discovery of the Electro - magnet 32. Schilling's Telegraph 33. Faraday's Discoveries . 34. Gauss and Weber's Telegraph . 35. Steinheil's Telegraph 27 28 Morse's Invention of an Electro- 29 ...
Página xii
... Telegraph of Siemens and Halske 156 105. Alarm used with same 161 • 106. Bréguet's Electro - magnetic Dial Instrument 107. Wheatstone's Universal Telegraph 163 169 Alarm Systems 108. Kramer's Pointer Telegraph 109 . 110. Principle of ...
... Telegraph of Siemens and Halske 156 105. Alarm used with same 161 • 106. Bréguet's Electro - magnetic Dial Instrument 107. Wheatstone's Universal Telegraph 163 169 Alarm Systems 108. Kramer's Pointer Telegraph 109 . 110. Principle of ...
Página 1
... TELEGRAPH , WITH DESCRIPTIONS OF SOME OF THE APPARATUS . I. EARLY OBSERVATIONS OF ELECTRICAL PHENOMENA . 1. THE history of the electric telegraph includes three distinct periods . The first of these embraces the earliest observations of ...
... TELEGRAPH , WITH DESCRIPTIONS OF SOME OF THE APPARATUS . I. EARLY OBSERVATIONS OF ELECTRICAL PHENOMENA . 1. THE history of the electric telegraph includes three distinct periods . The first of these embraces the earliest observations of ...
Página 7
... telegraph . This interesting communication is as follows : - " TO THE EDITOR OF THE SCOT'S MAGAZINE . ' Renfrew , Feb. 1st , 1753 . 66 ' SIR , -It is well known to all who are conversant in electrical ex- periments that the electric ...
... telegraph . This interesting communication is as follows : - " TO THE EDITOR OF THE SCOT'S MAGAZINE . ' Renfrew , Feb. 1st , 1753 . 66 ' SIR , -It is well known to all who are conversant in electrical ex- periments that the electric ...
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Términos y frases comunes
alphabet alternate currents armature arrangement atmospheric electricity attracted axis back contact beam bottom cable carried clockwork coils commutator connected consists construction contact-pins copper core corresponding current passes currents arriving cylinder deflected dial direction disc drum electricity electro-magnet employés galvanic galvanometer galvanoscope gutta percha hemp holes horizontal inductor inserted insulated intermediate station interrupted iron wires knot length letter lever Leyden jar lifted line battery line wire line-wire local battery means Messrs metal method mètre Morse apparatus motion needle negative current opposite paper strip permanent magnet plate pointer poles positive current posts pressed printing printing-press ratchet-wheel ratus receiving station relay resistance roller rotating round scape-wheel screw sending station shaft shown in Fig side Siemens signals soft-iron spiral spring style surface switch synchronism teeth terminal tion tongue tooth transmitting tube turning type-wheel underneath upper vertical vulcanite wheel whilst wire zinc
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Página 5 - he felt himself struck in his arms, shoulders, and breast, so that he lost his breath, and was two days before he recovered from the effects of the blow and the terror.
Página 11 - ... and his wife, by remarking the corresponding motions of the ball, writes down the words they indicate: from which it appears he has formed an alphabet of motions. As the length of the wire makes no difference in the effect, a correspondence might be carried on at any distance...