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The Laws of Lines of Force
All the lines of magnetic force are closed upon themselves, all dielectric lines of force terminate on conductors, but may form closed loops in electromagnetic radiation. These represent the basic laws of lines of force. It can be seen from these laws that any line of force cannot just end in space.

Faraday & Lines of Force Theory
Faraday felt strongly that action at a distance is not possible through empty space, or in other words [ p.293 in “Experimental Researches in Electricity” vol.3 ], matter cannot act where it is not. He considered space pervaded with lines of force.