By recognizing that the chemical atom is composed of single separable electric quanta, humanity has taken a great step forward in the investigation of the natural world.
Johannes StarkWe have learnt through experience that when an electrical ray strikes the surface of an atom, an electron, and in some circumstances a second and even a third electron, can be detached.
Johannes StarkWe can in fact first place the beam of rays of moving positive atomic ions in a plane perpendicular to the axis in which we see the spectral lines emitted by them.
Johannes StarkIt is more likely that more than a century will pass before we know the structure of the chemical atoms as thoroughly as we do our solar system.
Johannes Stark