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| vi | CONTENTS |
| Art. | Page |
|---|---|
| 391. Expansion of the potential of a magnet in spherical harmonics | 16 |
| 392. The centre of a magnet and the primary and secondary axes through the centre | 17 |
| 393. The north end of a magnet in this treatise is that which points north, and the south end that which points south. Boreal magnetism is that which is supposed to exist near the north pole of the earth and the south end of a magnet. Austral magnetism is that which belongs to the south pole of the earth and the north end of a magnet. Austral magnetism is considered positive | 19 |
| 394. The direction of magnetic force is that in which austral magnetism tends to move, that is, from south to north, and this is the positive direction of magnetic lines of force. A magnet is said to be magnetized from its south end towards its north end | 19 |
Chapter II.
magnetic force and magnetic induction.
| 395. Magnetic force defined with reference to the magnetic potential | 21 |
| 396. Magnetic force in a cylindric cavity in a magnet uniformly magnetized parallel to the axis of the cylinder | 22 |
| 397. Application to any magnet | 22 |
| 398. An elongated cylinder. Magnetic force | 23 |
| 399. A thin disk. Magnetic induction | 23 |
| 400. Relation between magnetic force, magnetic induction, and magnetization | 24 |
| 401. Line-integral of magnetic force, or magnetic potential | 24 |
| 402. Surface-integral of magnetic induction | 25 |
| 403. Solenoidal distribution of magnetic induction | 25 |
| 404. Surfaces and tubes of magnetic induction | 27 |
| 405. Vector-potential of magnetic induction | 27 |
| 406. Relations between the scalar and the vector-potential | 28 |
Chapter III.
particular forms of magnets.
| 407. Definition of a magnetic solenoid | 31 |
| 408. Definition of a complex solenoid and expression for its potential at any point | 32 |
