788 



INDEX. 



JACOBI'S rheostate, 930. 



Jamin's test nail, 416; observations 



on magnets, 431. 

 Jar, Leyden, 79, 824. 

 Joule's law, 244; number, 917, 1113; 



tangent galvanometer, 837 ; use of 



electrodynamometer, 866. 



K 



KERR'S experiment, 596. 



Kirchhoff's hypothesis, 201 ; laws, 208. 



LAMELLAR magnets, 331 ; magnetisa- 

 tion, 375. 



Lane's jar, 824. 



Laplace, equations, 31. 



Laws, of contact, 188 ; Kirchhoff's, 208 ; 

 Ohm's, 208 ; Joule's, 244 ; its connec- 

 tion with Ohm's, 245 ; Faraday's, 

 250, 254; Becquerel's, 258, 272; of 

 Volta, 272 ; of Magnus, 272 ; of Lenz, 

 511, 655; Verdet's, 594. 



Layers, action of spherical, 43 ; fictive, 



III, Il8, 1212. 



Legendre's polynomials, 760. 



Length, unit of, 656. 



Lenz'slaw, 511, 517, 655. 



Leyden jar, 79, 1042. 



Light, electromagnetic theory of, 627 ; 

 velocity of, 1138. 



Lighting by incandescence, 1245. 



Lines of forces, 21, 105, 106, 627; of 

 magnetic induction, 324. 



Lippmann's capillary electrometer, 825 ; 

 galvanometer, 862 ; experiments, 270. 



Liquids, electromagnetic rotation of, 

 485; resistance of, 1291; magnetic 

 rotatory power of, 1296; specific in- 

 ductive capacity of, 1073. 



Loadstone, 287. 



Logarithmic decrement, 68 1. 



Long magnets, 419. 



Lorenz, theory of electricity, 626. 



M 



MACHINES, magneto-electrical, 1257; 

 mixed, 1257; with variable current, 

 1280; electrical, 194, 195. 



Magnet, poles of a, 295 ; terrestrial, 307 ; 

 uniform, 312, 319. 



Magnetic parallels, 434; field, 1139, 

 of a current, 443; shell, 450; mo- 

 ments, 1189; machines, 1257; con- 

 stants, 1295; rotatory power, 1296; 

 meridian, 305 ; rigidity, 342 ; sus- 

 ceptibility, 383. 



Magnetisation, 406 ; potential of, 332 ; 

 coefficient of induced. 374, 383 ; uni- 

 form, 385 ; of a sphere, 386 ; experi- 

 mental determination of the coefficient 

 of, 393, 413; intensity of, 318, 1196; 

 by currents, 499; induced, 1200; 

 variation with magnetising force, 

 1208; maximum intensity of, 1298; 

 coefficients of, 1295. 



Magnetism, terrestrial, 306, 441, 1296 ; 

 density of force, 313; rigid and in- 

 duced, 406; its distribution in mag- 

 nets, 1211; active, 1271; specific, 

 1295 ; sub-permanent, 1231. 



Magneto-electrical machines, 1257. 



Magnets, 287, 288 ; long and short, 

 Coulomb's definition of, 419; poles 

 of, 295, 1216; cylindrical, 419; em- 

 pirical formulae of, 420; solenoidal, 

 328. 



Magnus, law of, 272. 



Mance's method, 962. 



Marine galvanometer, 851. 



Mariner's compass, 1231. 



Mass, unit of, 656. 



Masses, magnetic, 293; electrical, 4; 

 measurement of, 801. 



Maxwell's method of determining the 

 action of a coil, 743 ; of determin- 

 ing the coefficient of mutual induc- 

 tion, 777 ; electrodynamometer, 866 ; 

 theory of displacement, 1 26, 430, 

 465, 626. 



Measurement of polarization, 1019. 



Measurements, electrometric, 1009 ; 

 electromagnetic, 1014; calorimetric, 

 1104. 



