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��INDEX.

��Lagrange s (J. L.) dynamical equations,

553-565.

Lame&quot;, G., 17, 147. Lamellar magnet, 412. Laplace, P. S., 70. Laplace s coefficients, 128-146.

equation, 26, 77, 144, 301.

expansion, 140. Leibnitz, G. W., 18, 424. Lenz, E., 265, 530, 542.

Light, electromagnetic theory of, 781-805.

and magnetism, 806-831. Line-density, 64, 81.

integral, 16-20.

of electric force, 69, 622.

of magnetic force, 401, 481, 498, 499, 590, 606, 607, 622.

Lines of equilibrium, 112.

of flow, 22, 293.

of electric induction, 82, 117-123.

of magnetic induction, 404, 489, 529, 541, 597, 702.

Linnaeus, C., 23. Liouville, J., 173, 176. Listing, J. B., 18, 23, 421. Lorenz, L., 805 n. Loschmidt, J., 5.

��Magnecrystallic phenomena, 425, 435,

839. Magnet, its properties, 371.

direction of axis, 372-390.

magnetic moment of, 384, 390.

centre and principal axes, 392.

potential energy of, 389. Magnetic action of light, 806.

disturbances, 473.

force, law of, 374.

direction of, 372, 452.

intensity of, 453.

induction, 400. Magnetic matter, 380.

measurements, 449-464.

poles, 468.

survey, 466.

variations, 472. Magnetism of ships, 441.

terrestrial, 465-474. Magnetization, components of, 384.

induced, 424-430.

Ampere s theory of, 638, 833.

Poisson s theory of, 429.

Weber s theory of, 442, 838. Magnus (G.) law, 251. Mance s, Henry,, method, 357. Matthiessen, Aug., 352, 360. Measurement, theory of, 1.

of result of electric force, 38.

of electrostatic capacity, 226-229.

of electromotive force or potential, 216, 358.

of resistance, 335-357.

of constant currents, 746.

of transient currents, 748,

��Measurement of coils, 70S, 752-757.

magnetic, 449-464. Medium, electromagnetic, 866.

luminiferous, 806. Mercury, resistance of, 361. Metals, resistance of, 363. Michell, John, 38. Miller, W. H., 23. Mirror method, 450.

Molecular charge of electricity, 259.

currents, 833.

standards, 5.

vortices, 822. Molecules, size of, 5.

electric, 260.

magnetic, 430, 832-845. Moment, magnetic, 384.

of inertia, 565. Momentum, 6.

electrokinetic, 578, 585. Mossotti, O. F., 62. Motion, equations of, 553-565. Moving axes, 600.

conductors, 602.

images, 662.

Multiple conductors, 276, 344.

functions, 9. Multiplication, method of, 747, 751.

��Neumann, F. E., coefficient of magnetiza tion, 430.

magnetization of ellipsoid, 439.

theory of induced currents, 542. Neumann, C. G., 190, 830, 863. Nicholson s Revolving Doubler, 209. Nickel, 425.

Null methods, 214, 346, 503.

��Orsted, H. C., 239, 475. Ohm, G. S., 241, 333. Ohm s Law, 241. Ohm, the, 338, 340, 629. Opacity, 798. Ovary ellipsoid, 152.

��Paalzow, A., 364. Paraboloids, confocal, 154. Paramagnetic (same as Ferromagnetic),

425, 429, 844. Peltier, A., 249. Periodic functions, 9. Periphractic region, 22, 113. Permeability, magnetic, 428, 614. Phillips, S. E., 342. Plan of this Treatise, 59. Plane current-sheet, 656-669. Planetary ellipsoid, 151. PJatymeter, electro-, 229. Plucker, Julius, 839. Points of equilibrium, 112. Poisson, S. D, 155, 431, 437, 674. Poisson s equation, 77, 148.

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