Proceedings of the Royal Irish Academy. 

 For the general case of a moving distribution, we haA'e 



dy dz di/\dx dy ) dz\dz dx J dx\dx dy dz j 

 dtdx dt- dt 



dy dz ~ dy [ dz dt J dz V dy - dt J" dt' 



These are precisely the equations of Maxwell, with the convection current 

 added to the displacement current. 



