James Clerk Maxwell Quote

It is extremely improbable however that when we come to understand the true nature of electrolysis we shall retain in any form the theory of molecular charges, for then we shall have obtained a secure basis on which to form a true theory of electric currents, and so become independent of these provisional theories.

A Treatise on Electricity and Magnetism, Part II, Chapter IV (p. 381), At The Clarendon Press. 1904