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��441

��Equations of conductivity, 298, 609.

of continuity, 35.

of electric currents, 607.

of total currents, 610.

of electromagnetic force, 603.

of electromotive force, 598.

of Laplace, 77.

of magnetization, 400, 605.

of magnetic induction, 591.

of Poisson, 77.

of resistance, 297. Equilibrium, points of, 112-117.

��False magnetic poles, 468. Faraclav, M., his discoveries, 52, 55, 236, 255, 530, 531, 534, 546, 668, 806.

his experiments, 28, 429, 530, 668.

his methods, 37, 82, 122, 493, 528, 529, 541, 592, 594, 604.

his speculations, 54, 60, 83, 107, 109, 245, 429, 502, 540, 547, 569, 645, 782.

Farad, 629.

Fechner, G. T., 231, 274, 848. Felici, R., 536-539, 669. Ferromagnetic, 425, 429, 844. Field, electric, 44.

electromagnetic, 585-619.

of uniform force, 672. First swing, 745. Fizeau, H. L., 787- Fluid, electric, 36, 37.

incompressible, 61, 111, 295, 329, 334.

magnetic, 380. Flux, 12.

Force, electromagnetic, 475, 580, 583.

electromotive, 49, 69, 111, 233, 241, 246-254, 358, 569, 579, 595, 598.

mechanical, 92, 93, 103-111, 174, 580, 602.

measurement of, 6.

acting at a distance, 105.

lines of, 82, 117-123, 404. Foucault, L., 787.

Fourier, J. B. J.. 2w, 243, 332, 333, 801- 805.

��Galvanometer, 240, 707.

differential, 346.

sensitive, 717.

standard, 708.

observation of, 742-751.

Gases, electric discharge in, 55-77, 370.

resistance of, 369. Gassiot, J. P., 57. Gaugain, J. M., 366, 712. Gauge electrometer, 218.

Gauss, C. F., 18, 70, 131, 140, 144, 409, 421, 454, 459, 470, 706, 733, 744, 851. Geometric mean distance, 691-693. Geometry of position, 421. Gibson and Barclay, 229, 789. Gladstone, Dr. J. H., 789. Glass, 51, 271, 368.

��Glow, electric, 55. Grassmann, H., 526, 687. Grating, electric effect of, 203. Green, George, 70, 89, 318, 439. Green s function, 88, 101. theorem, 100. Groove, electric effect of, 399. Grove, Sir W. R., 272, 779. Guard-ring, 201, 217, 228. Gutta-percha, 51, 367-

��Hamilton, Sir W. Rowan, 10, 561. Hard iron, 424, 444. Harris, Sir W. Snow, 38, 216. Heat, conduction of, 801.

generated by the current, 242, 283, 299.

specific, of electricity, 253. Helix, 813.

Helmholtz, H., 88, 100, 202, 421, 543,

713, 823, 854.

Heterostatic electrometers, 218. Hockin, Charles, 352, 360, 800. Holtz, W., electrical machine, 212. Hornstein, Karl, 471 n. Huygens, Christian, 782. Hydraulic ram, 550. Hyposine, 151.

��Idiostatic electrometers, 218. Images, electric, 119, 155-181, 189.

magnetic, 318.

moving, 662.

Imaginary magnetic matter, 380. Induced currents, 528-552.

in a plane sheet, 656-669.

Weber s theory of, 856. Induced magnetization, 424-448. Induction, electrostatic, 28, 75, 76, 111.

magnetic, 400. Inertia, electric, 550.

moments and products of, 565. Insulators, 29.

Inversion, electric, 162-181, 188, 316. Ion, 237, 255. Iron, 424.

perchloride of, 809. Irreconcileable curves, 20, 421.

��Jacobi, M. H., 336.

Jenkins, William, 546. See Phil Mag.,

1834, pt. ii, p. 351. Jenkin, Fleeming, 763, 774. Jochmann, E., 669. Joule, J. P., 242, 262. 448, 457, 463, 726,

767.

��Keystone of electrodynamics, 861. Kinetics, 553-565.

Kirchhoff, Gustar, 282, 316, 439, 758. Kohlrausch, Rudolph, 265, 365, 723, 771.

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