INDEX. 



439 



Henry, Joseph, on induced currents of 



higher orders, 406 

 Holtz, IV., his electric machine, 46 



on electric shadows, 293 (foot- 

 note] 



on tubes having unilateral re- 

 sistance, 300 



Hopkinson, John, on dielectric cap- 

 acity of glass, 270 

 on residual charge and its 



return, 53, 272 

 Horizontal component of magnetism, 



123, 138 



Hughes, David Edward, the Print- 

 ing Telegraph,*423 

 the Microphone, 437 

 Humboldt, Alexander von, on elec- 

 tric eels, 68 



discovers galvanic smell, 228 

 produced electric contractions 



in fishes, 229 

 Hunter, Dr. John, on effect of 



current on sight, 228 

 Hydroelectric machine, 44 



IMAGES, electric, 250 

 Incandescent electric lights, 374 

 Inclination (or Dip), 137 



variation of, 141 

 Index Notation, 3250 

 Induced charges of electricity, 18 



currents, 391 



Induction (electrostatic) of charges, 

 18 



(magnetic) lines of, 89 



(magnetic) of magnetism, 89, 



3*3 



coefficient of, 342 

 (magneto-elects ic) of currents, 



39i 



Induction-coil or Inductorium, 398 

 Induction-convection machines, 45 

 Inductive-capacity, specific, 21, 49, 



268, 272 



Insulators, 8, 27 

 Intensity of current, 179 



ef earth's magnetic force, 138, 



3 2 5 a 



of magnetic field, 312 

 of magnetisation, 313 

 Inverse Squares, Law of, 16, 117, 235, 



245 



Inversion, Thermo-electric, 382 

 Ions, 210 



Isoclinic lines, 139 

 Isogonic lines, 139 



Jacobi, Morltz Hermann, on local 



action, 162 



discovers galvanoplastic pro- 

 cess, 420 

 his boat propelled by electricity, 



theory of electromotors, 377 

 Jablochkojfr, Paul, his battery, 182 



electric candle, 373 

 Jar, Ley den, 51 



capacity of, 50, 267, 277 

 cascade arrangement of, 



279 



,, discharge of, 51, 295 

 ,, discovery of, 52 

 ,, energy of charge of, 278 

 ,, seat of charge of, 55 

 ,, spark of, 289, 296 

 ,, theory of, 267 

 Unit, 259 



Jenkin, Fleeming, on cable as con- 

 denser, 274 



on magnetic saturation, 328 

 on retardation in cables, 296 

 Joule, James Prescott, on effects of 



magnetisation, 113 

 Law of Heat of Current, 367 

 Mechanical equivalent of Heat, 



288, 414 



on atmospheric electricity, 306 

 on lifting - power of electro- 

 magnet, 330 

 &-effect, the, 380, 367 



KATHODE, 207 

 Kation, 210 

 Keeper, 101 



Kerr, Dr. John, Electro - optic dis- 

 coveries, 273, 386 

 Magneto-optic discoveries, 114, 



Kinnersley, Elijah, Electric Ther- 

 mometer, 288 

 Kirchhoff, Gustav, Laws of Branched 



Circuits, 353 ^ 

 Kite, the electric, 302 

 Kohlrausch, F., on residual charge, 



272 



on electro-chemical equivalent, 

 211 (footnote) 



LAMELLAR magnetisation, 107 



