436 



INDEX. 



Discharge affected by points, 43, 290, 



effects of, 43, 284, 286 



electrical, 7, 280 



glow, 290, 302 (footnote} 



limit of, 248 



sensitive state of, 294 



velocity of, 296 

 Discharger, Discharging-tongs, 51 



Universal, 54 



Disruption produces electrification, 60 

 Dissectable Leyden Jar, 55 

 Dissipation of Charge, 299 

 Distillation, electric, 223 _ 

 Distribution of Electricity, 28, 35, 

 248, 249 



of Current, 240 



of Magnetism, 104, 122 

 Divided Circuit, 353 



Touch, 93 



Dolbear's Telephone, 436 

 Doubler, 23, 45 

 Double Touch, 94 

 Dry-Pile, 182, 264 

 Duboscq s Lamp, 372 

 Du Fay's experiments, 4, 27 

 Duplex Telegraphy, 275, 428 

 Duration of Spark, 296 

 Duter on Electric Expansion, 273 

 Dynamic Electricity (see Current 



Electricity) 



Dynamo-electric machines, 408 

 Dyne, the (unit of force), 255 



E 



EARTH, the, a magnet, 88 

 currents, 275, 403 

 electrostatic capacity'of, 325b 

 intensity of magnetisation, 313 

 magnetic moment of, 32$b 

 used as return wire, 423 



Earth's magnetism (see Terrestrial 

 Magnetism) 



Edison, Thomas Alva, electric lamp, 



carbon telephone, 436 

 meter for currents, 216 

 quadruplex telegraphy, 428 



Edlund on galvanic expansion, 221 



Eel, electric (Gymnotus), 68 



Electrics, i 



Electric Air-Thermometer, 288 

 Cage, 34 

 Candle, 373 

 Clocks, 433 

 Distillation, 223 

 (Frictional) machines, 39 



Electric Egg, the, 291 



Expansion, 273 



Force, 155 (footnote), 241 



Fuze, 286, 370 



Images, 250 



Kite, 302 



Lamps, 372 



Light, 371 



Mill or Fly, 43 



Oscillations, 295 



Osmose, 222 



Pistol, 286 



Shadows, 293 



Shock, 226 



Wind, 43 



Electricity, thepries of, 6, 300 

 Electro-capillary phenomena, 225 

 Electro-chemical equivalents, 211, 212 

 Electro-chemistry, 412 

 Electrodes, 207 



unpolarisable, 231 

 Electrodynamics, 331 

 Electrodynamometer, 336 

 Electrolysis, 208 



laws of, 211, 414, 417 



of copper sulphate, 209 



of water, 207, 413 



theory of, 414 

 Electrolytes, 207, 417 

 Electrolytic convection, 418 

 Electromagnets, 98, 326 



laws of, 328 



Electromagnetic engines (motors), 375 

 Electromagnetics, 310 

 Electromagnetic theory of Light, 390 

 Electromagnetism, 326 

 Electrometallurgy, 419 

 Electrometer, absolute, 261 



attracted-disc, 261 



capillary, 225, 265 



Dell-man^s, 260 



divided-ring, 71 



Peltier's, 260, 307 



portable, 261 



quadrant (Sir W. Thomson's), 

 262 



repulsion, 260 



torsion, 15 



trap-door, 261 

 Electromotive-force, 155 



measurement of, 360 



unit of, 322, 323 

 Electromotors, 375 

 Electro-Optics, 385 

 Electrophorus, 22 



continuous, 23, 45 

 Electroplating, 421 

 Electroscopes, n 



Bohnenbergeits, 13, 264 



