INDEX. 



349 



Lippmann's electrometer, 320 

 Local action and voltaic action, 16 

 Lodge, Sir Oliver, Electrons, 236, 



Lightning Conductors ana 



Lightning Guards, 322 

 Modern Views of Electricity, 



242 

 Lorenz's method for measuring resistance, 



2 7 8 



Lyndon, Storage Battery Engineering, 

 18 



Magnet, behavior of, in a uniform field, 



73 



in a non-uniform field, 74 

 near an electric wire, 94 

 the, 6 1 

 pole, algebraic sign of, 65 



and flux, general relation be- 

 tween, 71 

 strength of, 63 

 poles, 62 



distributed and concentrated, 63 

 the permanent, 62 

 Magnets, astatic system of, 1 12 



permanent, 83 



Magnetic attraction, Coulomb's Law, 64 

 blow-out, the, 152 

 effect of the electric current, I, 93 

 elements, 293 

 field, action of upon suspended coil, 



1 06 



around a magnet pole, 67 

 inside of a long solenoid, 102 

 intensity of, 66 

 measurement of, 287 

 mechanical conception of, 242 

 near a long slim pole, 71 

 the, 65 



tension and energy of, 76 

 uniform, action of, upon a 



magnet, 73 

 and non-uniform, 67 

 non-uniform, action of, upon a 



magnet, 74 



fields, composition of, 68 

 resolution of, 69 



Magnetic figures, 65 

 flux and pole strength, general re- 

 lation between, Ji 

 definition of, 69 

 measurement of, 287 

 from a magnet pole, 70 

 maps, 294 



rotation of polarization of light, 318 

 saturation, 84 

 separator, the, 76 

 Magnetism of iron, 6 1 

 residual, 83 

 terrestrial, 292 

 Magnetite arc lamp, 340 

 Magnetization, intensity of, 84 

 of iron, 8 1 



Ewing's theory of, 86 

 molecular theory of, 85 

 Manganin, 32 



Marconi, wireless telegraphy, 334 

 Maxwell, definition of the, 70 

 Maxwell's Electricity and Magnetism, 



162 



Measurement of current, 276 

 of capacity, 286 



of electric current by electrolysis, 7 

 of electromotive force, 282 

 of insulation resistance, 282 

 of magnetic fields, 287 



flux, 287 

 of power, 284 

 of resistance, 26, 278 

 Measurements, electrical, 276 

 Mechanical analogies of electromotive 



force and resistance, 117 

 of induced electromotive force, 



US 

 analogue of condenser, 166 



of electrically charged bodies 



and of the electric field, 164 

 of inductance, 144 

 and electrical analogies, 342 

 conception of electric field, 242 



of magnetic field, 242 

 theory versus atomic theory of elec- 

 tricity, 219 

 Microfarad, definition of, 166 



