56 Conwav—A New Foundation for Electrodynamics. 
V~? dat (X, VY, Z) + 40 (ty, %, 43) = Curl (a, B, vy), where (a, %, %) denotes the true 
current. The assumed expressions then agree with the known relations for 
electrostatic and radiation phenomena; whilst for slow motions we can put V=0, 
and the expressions become those of Helmholtz, which agree with the various 
phenomena of electric currents. 
