INDEX. 



Electromagnetic action of a coil, 728 ; 

 balance, 835; measurements, 1014; 

 intensity, 430 ; units, 461 ; rotation, 

 480; solenoid, 494. 



Electromagnets, 499. 



Electrometer, discharge, 824 ; capil- 

 lary, 825. 



Electrometers, 796 ; graduation of, 798 ; 

 classification of, 799. 



Electrometric measurements, 1009. 



Electromotive force, 23, 200, 1292; of 

 contact, 187 ; dimensions of, 607, 

 1007 ; seat of the, 1023 ; of contact 

 of two metals, 1024 ; of metal and 

 liquid, 1026 ; of two liquids, 1027 ; 

 relation of to energy, 1037; transient, 

 I in; constant, 1126; measurement 

 of a, 1131. 



Electromotors, 557. 



Electroscope, gold leaf, 797. 



Electrostatic pressure, 41, 104; induction 

 balance, 1067 ; machines, 1240. 



Elements, magnetic, 305 ; electro- 

 motive force of, 1292. 



Ellipsoid, 74 ; of induction, 1228 ; 

 potential of a magnetic, 356 ; mag- 

 netisation of, 410. 



Elliptic integrals, determination of co- 

 efficient of mutual induction by, 763. 



Energy, electrical, 88 ; of a single con- 

 ductor, 89 ; of a system of conductors, 

 90; potential of magnets, 338; of a 

 magnetic shell, 339 ; chemical rela- 

 tion of to E.M.F., 1037; distribution 

 of, 1276. 



Equation of continuity, 379 ; of Laplace 

 and Poisson, 31. 



Equator, magnetic, 306, 435. 



Equilibrium, of conductors, 25, 65 ; 

 points and lines of, 47; unstable, of 

 a magnet, 1209. 



Equipotential surfaces, 23, 147. 



Equivalent, electrochemical, 257. 



Errors, heeling, 1235. 



Extra current, 508, 534, 549. 



FALSE pole, 436. 

 Farad, 613. 



Faraday's cylinder, 15; experiment on 

 electromagnetic rotation, 456, 484 ; 

 discovery of induction, 507, 508. 



Fatigue of a wire, 710. 



Faure's accumulator, 1249. 



Fictive layer, 418, 1212. 



Field, electrical, 20; representation of, 

 127; magnetic, 294; of a current, 

 443 ; equation of the, 566, 572 ; 

 uniform, 138; artificial, 840; of a 

 rotating frame, 1108; of a magnet, 

 1151; symmetrical, 131. 



Figure of Merit, 878. 



Filaments, magnetic, 304. 



Fish-back needle, 852. 



Flinder's bar, 1238. 



Flow of force, 28; refraction of, 113; 

 of electrical induction, 115; of elec- 

 tricity, 198 ; of magnetic induction, 



324. 



Force, electrical, 7; lines of, 21; tubes 

 of, 35 ; electromotive, 23, 1007 ; of 

 contact, 187; condensing, 78; elec- 

 trical expressed as pressure, 100; 

 coercive, 302 ; magnetising, 374 ; 

 demagnetising, 407 ; dimensions of 

 unit electrical, 607. 



Forces, central, 19; transient electro- 

 motive, 1 1 10. 



Formula, Green's, 34. 



Foucault's contact breaker, 1288; cur- 

 rents, 1261. 



Fourier's theorem, 70, 199, 200; ap- 

 plications of, 223. 



Friction, electrification by, 193. 



Function, characteristic, 1269. 



GALVANIC arc, 1248. 



Galvanometer, 503, 826, 829 ; ordi- 

 nary, 839 ; graduation of, 870 ; bal- 

 listic, 883 ; differential, 935, 937, 981, 

 1054; use of, 1149; sine, 832; tan- 

 gent, 833 ; Nobili's, 847 ; optical, 

 914; resistance of a, 961. 



Galvanoplastics, 1247. 



Gambey's discovery of damping in- 

 fluence of metal plate, 846. 



Gas condensers, 652. 



