INDEX. 



44 



[agnetism, solenoidal, 107, 314 



temporary, 90, 102, 313 



terrestrial, 88, 135 



theories of, 91, 115, 338 



unit of, 125 

 [agnetite, 76 



[agneto-electricity, 74, 391 

 [agne to-electric induction, 391 



machines, 407 

 [agnetographs, 146 

 Magnetometer, 124 



self-registering, 146 

 Magneto-optic Rotations, 387 

 Magnets, artificial, 77 



compound, 95 



forms of, 10 1 



lamellar, 107 



laminated, 95 



methods of making, 92-98 



natural, 76, 101 



power of, 103 

 r ance's method, 361 

 aps, magnetic, 139 

 ariner's Compass, 134 

 arked pole, 80 



'ascart, J3. t on self -registering 

 apparatus, 288 



on atmospheric electricity, 308 

 'atteuccz, Carlo, on physiological 

 effects, 68, 230 



on electromotive - force in 



muscle, 231 



aynooth Battery (see Callan's 

 Battery) 



axwell, James Clerk, Electro- 

 magnetic theory of Light, 

 337,365,390 



on ii.lectric Images, 250 



on protection from Lightning, 

 32, 305 



on residual charge of jar, 272 



on self-repulsion of circuit, 334 



rule for action of current on 

 magnet, 193, 317 



Theorem of equivalent Mag- 

 netic shell, 192, 318 



Theory of Magnetism, 115 

 jasurements, electrical, 355-363 



magnetic, 118, 32$a 

 jchanical effects of Discharge, 284, 



effects of magnetisation, 113 



,, in dielectric, 272 

 idical Applications of Electricity, 

 '32, 369 

 igohm, 323 



ndinger's Battery, 176 

 iridian, Magnetic, 136 

 ;tallo-chromy, 432 



Microfarad condenser, 276 

 Microphone, the, 437 

 Milliweber, 223 



Mimosa, the, electric behaviour of, 230 

 Minotto's Battery, 176 

 Mirror Galvanometer, 203 

 Moisture, effect of, i, 8, 299 

 Molecular theory of Electric action, 6 



actions of current, 221 

 Moment of Couple, 123 



of inertia, 32$a 



magnetic, 123 (footnote), 325a 

 Morse Telegraph instrument, 425 

 Mouse-mill (see Replenisher) 

 Mutter, Johannes, on strength of 



electromagnets, 328 

 Multiplier, Schiveigger's, 189 

 Muscular contractions, 229, 231 

 Musschenbroek, Peter van, dis- 

 covery of Ley den Jar, 52 



on Magnetic Figures, no 

 Mutual Induction, coefficient of, 320, 



397 

 Mutual Potential, coefficient of, 320 



Napoleon III.'s Battery, 182 

 Needle, magnetic, 79 

 Needle Telegraph, 424 

 Negative electrification, 4, 300 

 Newton, Sir Isaac, observations on 



action and reaction, 83 

 his lodestone, 103 

 suggests electric origin of light- 

 ning, 9, 302 

 suggests glass for electric 



machines, 38 

 Niaudets Battery, 173 

 Nobili, Leopoldo, on muscular con- 

 tractions, 68 

 on currents of animal electricity, 



231 



discovers NobiWs rings, 432 

 Non-conductors, 8 

 Non-electrics, 2 

 North and south, 81, 135 

 North magnetic pole, the, 81, 135 

 Null methods, 263 



Oerstedt, Hans Christian, discovers 

 magnetic action of current, 184, 

 185, 191 



Ohm, Dr. G. S., 179 



"Ohm's Law," 180, 345 



