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CONTENTS.
| Article | Page | |
|---|---|---|
| 609. | Equations of electric conductivity, (G) | 232 |
| 610. | Equations of total currents, (H) | 232 |
| 611. | Currents in terms of electromotive force, (I) | 233 |
| 612. | Volume-density of free electricity, (J) | 233 |
| 613. | Surface-density of free electricity, (K) | 233 |
| 614. | Equations of magnetic permeability, (L) | 233 |
| 615. | Ampère’s theory of magnets | 234 |
| 616. | Electric currents in terms of electrokinetic momentum The momentum or "impulse" associated with the motion of electricity. | 234 |
| 617. | Vector-potential of electric currents | 236 |
| 618. | Quaternion expressions for electromagnetic quantities Quaternions are a four-dimensional number system used in the 19th century to describe spatial rotations and physical fields before modern vector calculus became standard. | 236 |
| 619. | Quaternion equations of the electromagnetic field | 237 |
CHAPTER X.
DIMENSIONS OF ELECTRIC UNITS.
| 620. | Two systems of units | 239 |
| 621. | The twelve primary quantities | 239 |
| 622. | Fifteen relations among these quantities | 240 |
| 623. | Dimensions in terms of $[e]$ Electric charge. and $[m]$ Magnetic pole strength. | 241 |
| 624. | Reciprocal properties of the two systems | 241 |
| 625. | The electrostatic and the electromagnetic systems | 241 |
| 626. | Dimensions of the 12 quantities in the two systems | 242 |
| 627. | The six derived units | 243 |
| 628. | The ratio of the corresponding units in the two systems | 243 |
| 629. | Practical system of electric units. Table of practical units | 244 |
CHAPTER XI.
ENERGY AND STRESS.
| 630. | The electrostatic energy expressed in terms of the free electricity and the potential | 246 |
| 631. | The electrostatic energy expressed in terms of the electromotive force and the electric displacement | 246 |
| 632. | Magnetic energy in terms of magnetization and magnetic force | 247 |
| 633. | Magnetic energy in terms of the square of the magnetic force | 247 |
| 634. | Electrokinetic energy in terms of electric momentum and electric current | 248 |
| 635. | Electrokinetic energy in terms of magnetic induction and magnetic force | 248 |
| 636. | Method of this treatise | 249 |
| 637. | Magnetic energy and electrokinetic energy compared | 249 |
| 638. | Magnetic energy reduced to electrokinetic energy | 250 |
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