Hermann Helmholtz
"Only if the ponderable particles contain charges of true Electricity can the periodic alternations of the electric moments in the ether educe ponderomotive forces of the same period. The analogous assumption, that embedded atoms contain isolated northern or southern magnetism, I pass over as too improbable. On the other hand, the electrolytic phenomena, especially Faraday's law of electrolytic equivalents, have long since led to the assumption that electric charges of determinate magnitude attach to the valence positions of chemically bound ions - charges that can be now positive, now negative, but which must be everywhere, for every valence position of every atom, have the same absolute magnitude."
Helmholtz
See Also