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 v
... electric telegraph " has not been recognised , for the reasons stated ; and if a further reason be required , it may be ... electricity to this purpose did not occur to Grey , Watson , Franklin , and others , but , from its apparently ...
... electric telegraph " has not been recognised , for the reasons stated ; and if a further reason be required , it may be ... electricity to this purpose did not occur to Grey , Watson , Franklin , and others , but , from its apparently ...
Página ix
... Electric Telegraph 2. First Observations of Electricity by the Ancients 3. Early systematic Inquiries . 4. Discovery of the Transmission of Electricity 5. Terms " Electrics " and " Non - electrics " 6. Terms " vitreous " and " resinous ...
... Electric Telegraph 2. First Observations of Electricity by the Ancients 3. Early systematic Inquiries . 4. Discovery of the Transmission of Electricity 5. Terms " Electrics " and " Non - electrics " 6. Terms " vitreous " and " resinous ...
Página x
... ELECTRICITY . § 27. Romagnési's Discovery of Electro - magnetism 28. Schweigger's Multiplier 29. Ampère's Telegraph • PAGE 23 25 25 30. Ritchie's Telegraph 26 magnetic Telegraph 31. Sturgeon's Discovery of the Electro - magnet 32 ...
... ELECTRICITY . § 27. Romagnési's Discovery of Electro - magnetism 28. Schweigger's Multiplier 29. Ampère's Telegraph • PAGE 23 25 25 30. Ritchie's Telegraph 26 magnetic Telegraph 31. Sturgeon's Discovery of the Electro - magnet 32 ...
Página xii
... electric Pointer 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 ...
... electric Pointer 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 ...
Página xiii
... ELECTRICITY . PAGE 222 223 223 224 • 224 225 226 . 227 227 . 228 231 231 233 234 235 237 237 239 240 241 • 242 243 • 245 · 247 248 248 250 253 253 255 . 255 $ 166 . Franklin's Experiments 167. Theory of Thunder - storms 168. Steinheil's ...
... ELECTRICITY . PAGE 222 223 223 224 • 224 225 226 . 227 227 . 228 231 231 233 234 235 237 237 239 240 241 • 242 243 • 245 · 247 248 248 250 253 253 255 . 255 $ 166 . Franklin's Experiments 167. Theory of Thunder - storms 168. Steinheil's ...
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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...