If the time and the limit prescribed would admit, we could multiply experiments, all tending to prove the same law; but we must be content with the barely sufficient. But that the chemical process acts in depth, and first, therefore, realizes and integrates the fluxional power of magnetism and electricity, is involved in the term composition; and this will become still more convincing when we have learnt to regard decomposition as a mere co-relative, i.e. as decomposition relatively to the body decomposed, but composition actually and in respect of the substances, into which it was decomposed. The alteration in the specific gravity of metals in their chemical amalgams, interesting as the fact is in all points, is decisive in the present; for gravity is the sole inward of inorganic bodies—it constitutes their depth.
I can now, for the first time, give to my opinions that degree of intelligibility, which is requisite for their introduction as hypotheses; the experiments above related, understood as in the common mode of thinking, prove that the magnetic influence flows in length, the electric fluid by suffusion, and that chemical agency (whatever the main agent may be) is qualitative and in intimis. Now my hypothesis demands the converse of all this. I affirm that a power, acting exclusively in length, is (wherever it be found) magnetism; that a power which acts both in length and in breadth, and only in length and breadth, is (wherever it be found) electricity; and finally, that a power which, together with length and breadth, includes depth likewise, is (wherever it be found) constructive agency. That is but one phenomenon of magnetism, to which we have appropriated and confined the
