As you can see in my diagram this is complex experiment involving 2 batteries a vacuum and the results were labeled anode, cathode, and electron and proton. In a permanent magnet north and south poles are equal in strength. And there is no need to push magnetism through a vacuum to prove it exists. So what did this experiment really prove? Perhaps the particles of matter that were pushed out of the vacuum "rays" existed, due to the force of the current of north and south pole magnets moving in high speed against each other.
From Wikipedia: The electron is a subatomic particle carrying a negative electric charge. It has no known components or substructure.
The word electron actually comes from the Greek word for 'amber'. When amber was rubbed against an object such as fur it would display electro static capabilities.