The History and Progress of the Electric Telegraph: With Descriptions of Some of the ApparatusD. Van Nostrand, 1869 - 280 páginas |
Dentro del libro
Resultados 1-5 de 66
Página xii
... Iron Post 131. Menans ' Iron Post 132. Line Insulators 133. Clark's " " 134. Spanish 99 215 . 215 218 218 220 220 221 222 $ 135. Belgian Insulators . 136. French 137. Varley's 99 xii CONTENTS .
... Iron Post 131. Menans ' Iron Post 132. Line Insulators 133. Clark's " " 134. Spanish 99 215 . 215 218 218 220 220 221 222 $ 135. Belgian Insulators . 136. French 137. Varley's 99 xii CONTENTS .
Página 7
... iron rod . The moment the latter dipped the rod into the river , both felt a shock . Subsequently , in the same year , Watson transmitted an electric discharge through 2,800 feet of wire , and the same distance of earth , at Stoke ...
... iron rod . The moment the latter dipped the rod into the river , both felt a shock . Subsequently , in the same year , Watson transmitted an electric discharge through 2,800 feet of wire , and the same distance of earth , at Stoke ...
Página 15
... iron . If he changed the relative positions of the metals , he expe- rienced a different sensation , which he found difficult to describe . Sulzer supposed that the contact of the two metals occa sioned a vibration of their particles ...
... iron . If he changed the relative positions of the metals , he expe- rienced a different sensation , which he found difficult to describe . Sulzer supposed that the contact of the two metals occa sioned a vibration of their particles ...
Página 17
... iron balustrade of his house , by a hook of 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 ...
... iron balustrade of his house , by a hook of 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 ...
Página 18
... 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 two ...
... 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 two ...
Contenido
1 | |
2 | |
5 | |
6 | |
7 | |
8 | |
9 | |
10 | |
11 | |
12 | |
14 | |
15 | |
18 | |
19 | |
20 | |
23 | |
25 | |
31 | |
37 | |
43 | |
61 | |
91 | |
101 | |
106 | |
145 | |
147 | |
156 | |
162 | |
171 | |
172 | |
178 | |
202 | |
208 | |
222 | |
223 | |
231 | |
263 | |
273 | |
275 | |
278 | |
Otras ediciones - Ver todas
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...