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 17
... copper wire passed through part of the dorsal column remaining above the junc- tion of the thighs , it all at once underwent a series of lively convulsions . The professor was more than ever astonished , for there was this time no ...
... copper wire passed through part of the dorsal column remaining above the junc- tion of the thighs , it all at once underwent a series of lively convulsions . The professor was more than ever astonished , for there was this time no ...
Página 18
... copper and iron , in the experiment of Galvani , were the real electromotors , and that the muscles of the dead frogs only played the part of a moist conductor in completing the circuit . Volta was of opinion that the simple contact of ...
... copper and iron , in the experiment of Galvani , were the real electromotors , and that the muscles of the dead frogs only played the part of a moist conductor in completing the circuit . Volta was of opinion that the simple contact of ...
Página 19
... copper , then on this a disc of zinc , and over these a similar sized disc of damp cloth ; and by continuing to pile up discs of these materials , in the same order , copper , zinc , cloth , until he had a sufficient number . He then ...
... copper , then on this a disc of zinc , and over these a similar sized disc of damp cloth ; and by continuing to pile up discs of these materials , in the same order , copper , zinc , cloth , until he had a sufficient number . He then ...
Página 20
... copper disc at the bottom . These experiments may be repeated ad infinitum even after the pile has been mounted some hours , provided the cloth retains some moisture . 3rd . It produces chemical effects with an energy propor- tional to ...
... copper disc at the bottom . These experiments may be repeated ad infinitum even after the pile has been mounted some hours , provided the cloth retains some moisture . 3rd . It produces chemical effects with an energy propor- tional to ...
Página 22
... copper wires insulated with silk , passing through the tube E of glass or porcelain to the transmitting station . Here the wires , marked with the respective letters and numerals , were insulated on a wooden support , K K. The ends of ...
... copper wires insulated with silk , passing through the tube E of glass or porcelain to the transmitting station . Here the wires , marked with the respective letters and numerals , were insulated on a wooden support , K K. The ends of ...
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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
Pasajes populares
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...