Page:Zur Elektrodynamik bewegter Systeme I.djvu/10

 § 8. In the preceding discussions, we only spoke about the influence of motion on the electrodynamics of extended bodies. This is only a province of the great empire, in which the theory of electrons offers itself as a guidance. In this field lie, however, the problems with respect to which the ian theory was developed, and in which it continuously found its test and regulator.