quantities --- where should he be? Happily this is not the case. The Law is ONE throughout, and the apparent variety of its working results from the infinite variety of conditions under which it may work. Let us lay a foundation, then, by seeing how it works in what we call the common course of Nature. A few examples will suffice.

Hardly more than a generation ago it was supposed that the analysis of matter could not be carried further than its reduction to some seventy primary chemical elements which, in various combinations, produced all material substances; but there was no explanation how all these different elements came into existence. Each appeared to be an original creation, and there was no accounting for them. But nowadays, as the rustic physician says in Moliere's play of the Medecin Malgre Lui, "Nous avons change tout cela".

Modern science has shown conclusively that every kind of chemical atom is composed of particles of one original substance which appears to pervade all space, and to which the name of Ether has been given.

[The concept of Ether or Aether is regarded as a superseded scientific theory. Some new "aether" concepts have been proposed in recent years, but the descriptions of these concepts differ in fundamental ways from the description of the classical luminiferous aether. For example, in Schmelzer's "A condensed matter interpretation of SM fermions and gauge fields", not only the EM field, but all fermions (quarks as well as leptons) and all forces are described by waves of the ether. [24] - Ed. Thus we can understand that the concept of Ether was an early generalization in physics that is now regarded as a "placeholder" for more evolved concepts.]

Some of these particles carry a positive charge of electricity and some a negative, and the chemical atom is formed by the