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| xii | CONTENTS |
Chapter III.
Induction of Electric Currents..
| 528. Faraday's discovery. Nature of his methods | 162 |
| 529. The method of this treatise founded on that of Faraday | 163 |
| 530. Phenomena of magneto-electric induction | 164 |
| 531. General law of induction of currents | 166 |
| 532. Illustrations of the direction of induced currents | 166 |
| 533. Induction by the motion of the earth | 167 |
| 534. The electromotive force due to induction does not depend on the material of the conductor | 168 |
| 535. It has no tendency to move the conductor | 168 |
| 536. Felici's experiments on the laws of induction | 168 |
| 537. Use of the galvanometer to determine the time-integral of the electromotive force | 170 |
| 538. Conjugate positions of two coils | 171 |
| 539. Mathematical expression for the total current of induction | 172 |
| 540. Faraday's conception of an electrotonic state | 173 |
| 541. His method of stating the laws of induction with reference to the lines of magnetic force | 174 |
| 542. The law of Lenz, and Neumann's theory of induction | 176 |
| 543. Helmholtz's deduction of induction from the mechanical action of currents by the principle of conservation of energy | 176 |
| 544. Thomson's application of the same principle | 178 |
| 545. Weber's contributions to electrical science | 178 |
Chapter IV.
Induction of a Current on Itself..
| 546. Shock given by an electromagnet | 180 |
| 547. Apparent momentum of electricity | 180 |
| 548. Difference between this case and that of a tube containing a current of water | 181 |
| 549. If there is momentum it is not that of the moving electricity | 181 |
| 550. Nevertheless the phenomena are exactly analogous to those of momentum | 181 |
| 551. An electric current has energy, which may be called electrokinetic energy | 182 |
| 552. This leads us to form a dynamical theory of electric currents | 182 |
