444
��INDEX.
��Tables for magnetization of a cylinder, 439.
of resistance, 363-365.
of velocity of light and of electromag netic disturbance, 787-
of temporary and residual magnetiza tion, 445.
Tait, P. G., 25, 254, 387, 522, 687,
731.
Tangent galvanometer, 710. Tangents, method of, 454, 710. Telegraph cable, 332, 689. Temporary magnetization, 444. Tension, electrostatic, 48, 59, 107, 108.
electromagnetic, 645, 646. Terrestrial magnetism, 465-474. Thalen, Tobias Eobert, 430. Theorem, Green s, 100.
Earnshaw s, 116.
Coulomb s, 80.
Thomson s, 98.
Gauss , 144, 409. Theory of one fluid, 37.
of two fluids, 36.
of magnetic matter, 380.
of magnetic molecules, 430, 832-845.
of molecular currents, 833.
of molecular vortices, 822.
of action at a distance, 105, 641-646, 846-866.
Thermo-electric currents, 249-254. Thickness of galvanometer wire, 716,
719. Thomson, Sir William,
electric images, 43, 121, 155-181, 173.
experiments, 51, 57, 248, 369, 772.
instruments, 127, 201, 210, 211, 216- 222, 272, 722, 724.
magnetism, 318, 398, 400, 407-416, 428.
resistance, 338, 351, 356, 763.
thermo-electricity, 207, 242, 249, 252, 253.
theorems, 98, 138, 263, 299, 304, 652.
theory of electricity, 27, 37, 543, 831, 856.
vortex motion, 20, 100, 487, 702.
Thomson and Tait s Natural Philoso phy, 132, 141, 144, 162, 303, 553, 676.
Time, periodic of vibration, 456, 738. Time-integral, 541, 558. Torricelli, Evangelista, 866. Torsion-balance, 38, 215, 373, 726,
��Transient currents, 232, 530, 536,* 537, 582, 748, 758, 760, 771, 776.
��Units of physical quantities, 2.
three fundamental, 3.
derived, 6. . <
electrostatic, 41, 625.
magnetic, 374, 625.
electrodynamic, 526.
electromagnetic, 526, 620.
classification of, 620-629.
practical, 629.
of resistance, 758-767.
ratios of the two systems, 768-780.
��Variation of magnetic elements, 472.
Varley, C. F,, 210, 271, 332, 369.
Vector, ]0.
Vector-potential, 405, 422, 590, 617, 657.
Velocity represented by the unit of re sistance, 338, 628, 758.
by the ratio of electric units, 768-
780.
of electromagnetic disturbance, 784.
of light, 787.
of the electric current, 569. Verdet, M. E., 809, 830. Vibration, time of, 456. 738. Volt, 629. .
Volta, A., 246.
Voltameter, 237.
Vortices, molecular, 822-831.
��Water, resistance of, 365. Wave-propagation, 784, 785. Weber, W., 231, 338,346.
electrodynamometer, 725.
induced magnetism, 442-448, 838.
unit of resistance, 760-762.
ratio of electric units, 227, 771.
electrodynamic formula, 846-861. Wertheim, W., 447. Wheatstone s Bridge, 347.
electrostatic, 353, 756, 775, 778. Whewell, W., 237. Wiedemann, G., 236, 370, 446, 447. Wind, electric, 55.
W T ippe, 775. Work, 6.
��Zero reading, 735. Zonal harmonic, 132.
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