Page:A Treatise on Electricity and Magnetism - Volume 2.djvu/270

 Rh The equations (D) of magnetization, of which the first is

The equations (E) of electric currents, of which the first is

The equation of the current of conduction is, by Ohm's Law, That of electric displacement is

The equation of the total current, arising from the variation of the electric displacement as well as from conduction, is When the magnetization arises from magnetic induction, We have also, to determine the electric volume-density, To determine the magnetic volume-density, When the magnetic force can be derived from a potential