This page needs to be proofread.
xxii | CONTENTS. |
Art. | Page |
---|---|
818. Kinetic and potential energy of the medium | 406 |
819. Condition of wave-propagation | 406 |
820. The action of magnetism must depend on a real rotation about the direction of the magnetic force as an axis | 407 |
821. Statement of the results of the analysis of the phenomenon | 407 |
822. Hypothesis of molecular vortices | 408 |
823. Variation of the vortices according to Helmholtz's law | 409 |
824. Variation of the kinetic energy in the disturbed medium | 409 |
825. Expression in terms of the current and the velocity | 410 |
826. The kinetic energy in the case of plane waves | 410 |
827. The equations of motion | 411 |
828. Velocity of a circularly-polarized ray | 411 |
829. The magnetic rotation | 412 |
830. Researches of Verdet | 413 |
831. Note on a mechanical theory of molecular vortices | 415 |
Chapter XXII.
Electric Theory of Magnetism
832. Magnetism is a phenomenon of molecules | 418 |
833. The phenomena of magnetic molecules may be imitated by electric currents | 419 |
834. Difference between the elementary theory of continuous magnets and the theory of molecular currents | 419 |
835. Simplicity of the electric theory | 420 |
836. Theory of a current in a perfectly conducting circuit | 420 |
837. Case in which the current is entirely due to induction | 421 |
838. Weber's theory of diamagnetism | 421 |
839. Magnecrystallic induction | 422 |
840. Theory of a perfect conductor | 422 |
841. A medium containing perfectly conducting spherical molecules | 423 |
842. Mechanical action of magnetic force on the current which it excites | 423 |
843. Theory of a molecule with a primitive current | 424 |
844. Modifications of Weber's theory | 425 |
845. Consequences of the theory | 425 |
Chapter XXIII.
Theories of Action at a Distance.
846. Quantities which enter into Ampère's formula | 426 |
847. Relative motion of two electric particles | 426 |