If one is allowed, as is permitted by our current understanding of nearly all electrical effects, to refer to electricity as a fluid and thus compare it to a liquid that accumulates in certain bodies or flows depending on the circumstances, then wherever the explanation of an electrical phenomenon is concerned, the question of the amount of accumulated or flowing electricity and the resistance that hinders the accumulated electricity from moving outward and delays the flowing electricity in its course will arise. It is natural, as Ohm first did for galvanic current, to assume that an electrical effect is stronger the greater the amount of electricity involved and weaker the greater the resistance opposing the passage through the body on which the effect occurs.