568 



INDEX. 



Dissipation of energy in hysteresis, 375 

 Dissipation function, 125 

 Distance, reciprocal, 75 

 Distortion of waves, 546 

 Distribution on ellipsoid, 273 



,, on spherical bowl, 302 



Distributions, double, 226 



,, polarized, energy of, 239 



,, ,, potential of, 



231 



Distributive law, 1 

 Divergence, 66 



of force, 154 

 theorem, 66 



,, for two dimensions, 



177 



,, ,, in curvilinear coor- 



dinates, 173 



Double distributions, 228 

 Doublet, potential of, 233 

 Drude, 527 

 Duane, 397, 534 

 Duhem, 260 

 Dynamics, 91 

 Dynamo-machine, 453 

 Dyne, 100 



Earth-plates, 345 

 Eccentric cylinders, 311 

 Effective current, 479 

 Efficiency of transformer, 484 

 Electrets, 389 

 Electric field, 244 

 Electrical equilibrium, 253 

 "fluid," 248 



force, law of, 248 



image, 294 



in sphere, 298 



,, inversion, 301 



,, phenomena, 243 



,, quantities, dimensions of, 251 

 Electricity, not incompressible, 248, 508 



true, 358 



,, unit of, 252, 366 

 Electrification, 244 



,, theorems on sign of, 260 



Electrified sphere, energy of, 272 

 Electrodes, 336 

 Electrodynamic potential, 429 

 Electrokinetic energy, 439 

 Electrokinetics, 325 



Electromagnetic field, dynamical theory 



of, 515 



,, ,, equations of for 



media at rest, 509 

 ,, theory of light, 517 



,, units, 413 



Electromaguetism, equations of, 433 

 Electrometer, Bichat and Blondlot's, 282 

 Lord Kelvin's, 281 



Quadrant, 284 

 Electrometers, 281 



,, symmetrical, 283 



Electromotive force, 333 



,, ,, of induction, 469, 



555 



,, periodic, 477 



Electrostatic system of units, 252 



,, theory of cable, 535, 549 



,, units compared with prac- 



tical, 417 



Electrostatics, general problem of, 263 

 andmagnetostatics,paral- 



,, lei treatment of, 353 



Element of circuit, force on, 426 



,, of current, force due to, 422 

 Elements, parallel, attraction of, 431 

 Ellipses and hyperbolas, confocal, 319 

 Ellipsoid, capacity of, 274 

 ,, distribution on, 273 

 ,, polarized, couple experienced 



by, 370 



,, potential of, 210 

 for internal point, 



213 



,, of revolution, attraction of, 219 

 ,, ,, polarization of, 



374 



,, uniform polarization of, 369 

 Ellipsoidal coordinates, 31 

 homoeoid, 203 



Elliptic cylinder, polarization of, 373 

 ,, cylinders, distribution on, 315 

 Embranchment, point of, 338, 491 

 End of wire, correction for, 346 

 Energy, 91 



conservation of, 110 



,, dissipation of in hysteresis, 395 



of distributions, 219 



,, electrokinetic, 439 



,, equation of, 109 



in terms of field, 221 



