534 



Index 



Hamilton's Principle in dynamics, 476 

 Harmonics, spherical, 203 



,, zonal, 228 



,, biaxal, 237 



Heat, generation of in conductors, 309, 337 

 Holtz, influence machine of, 18 

 Hyperbolic cylinder (electrostatics), 261, 266 

 Hysteresis, magnetic, 400 



Images in electrostatics, 182, 253, 276 

 Induction, coefficients of, 93, 97 

 electrification by, 16 

 ,, explanation of, on electron theory, 



22 

 ,, magnetic, 373 



of electric currents, 441, 462, 484 

 Infinity, equipotentials and lines of force at, 



56 



Influence machines (electrostatic), 18 

 Insulators and conductors, 5, 522 

 Intensity (electrostatic), 24, 32, 33 



,, in wave of light, 531 



,, of magnetisation, 357 

 Introduction of a new conductor into electro- 

 static field, 104 



Inverse square, law of, 13, 31, 37, 354 

 Inversion, 198, 253 



Joule effect in conductors, 309 



Kirchhoff's laws, 300 



,, solution of equation of wave pro- 



pagation, 504 



Lagrange's equations, 478 



Lamp's functions, 247 



Laplace's equation, 40, 120, 238, 241 



,, solution of, 161, 203, 254 



Law of force (electrostatic), 13, 31, 37 

 ,, ,, (magnetic), 354 

 ,, ,, between current-elements, 430 



Least action, principle of, 477, 499 



Legendre's coefficients, 213 



Lenz's law of induction of currents, 442 



Leyden Jar, 77, 272 



Light, electromagnetic theory of, 3, 507, 513 

 ,, velocity of, 506, 513 



Lightning conductor, 61 



Lines of force (electrostatic), 25, 44, 56 

 ,, (magnetic), 359 

 ,, ,, flow, 330 

 ,, ,, induction, 375 



LiouviUe, solution of equation of wave-propa- 

 gation, 502 



Magnetic field, 358 



,, ,, produced by electric currents, 



414 



energy of, 381, 403, 483, 491 

 particle, 355 



,, ,, potential of, 360 



,, ,, potential energy of, 366 



,, ,, resolution of, 361 



,, ,, vector-potential of, 381 



,, matter, Poisson's imaginary, 364 



shell, 365, 415 

 ,, ,, potential of, 365 



,, ,, potential energy of, 3G9 



,, ,, vector-potential of, 383 



Magnetised body, 356 



,, ,, potential of a, 361 



,, ,, potential energy of a, 370 



,, ,, measurement of force inside 



a, 370 

 Magnetism, molecular theories of, 3, 406, 491 



terrestrial, 388 



Magnetostriction, 405 

 Mass, electromagnetic, 509, 526 

 Matter, imaginary magnetic, 364 

 Maxwell, 2, 3, et passim 



,, displacement theory in electrostatics, 



151 



,, displacement currents, 495 

 ,, electromagnetic theory of light, 506, 



513 

 Measurements, theoretical : 



quantity of electricity, 7 

 force inside a magnetised 



body, 370 

 ,, practical: 



potential difference, 107 

 charge of electricity, 109, 426 

 current of electricity, 303, 



422 



resistance, 303 

 inductive capacity of a con- 

 ductor, 349 



Mechanical force on the surface of a con- 

 ductor, 19, 79, 175 

 ,, ,, on conductor, 102 



,, ,, on dielectric, 169 



,, ,, at boundary of dielectric, 



175 



in magnetic field, 401, 426 

 ,, ,, on a circuit conveying a 



current, 428, 490 



,, ,, in propagation of light, 530 



Metallic media, decay of light- waves in, 521, 

 525 



