Page:Über die Konstitution des Elektrons (1906).djvu/1

 by.

Introduction
In the year 1881, showed that an electrically charged body (due to its magnetic field caused by its motion according to 's theory) must behave with respect to external forces, as if its mass would be increased by a certain amount depending on the magnitude of its charge and its shape. After calculated the distortion of the field dragged by a charged sphere, which occurs when the velocity of the moving charge is comparable to the speed of light, it was additionally shown by , that the mass-increase stated by him is not constant anymore with respect to such velocities, but grows with increasing velocity. The