1886. Farraday’s reasoning and observations, founded on the idea that the only difference between galvanic and frictional electricity was that between quantity and intensity, led him to take up the idea that a grain of water with an equivalent of zinc would evolve as much electricity as sixteen millions of square feet of coated glass, charged by a powerful machine of fifty inches in diameter. I am surprised that Farraday did not consider his premises erroneous, when he found them involving such startling conclusions.
1887. The source of this startling inference was, I think, as follows: Farraday entertained the opinion, that the only difference between voltaic and frictional electricity was that of quantity and intensity. He went so far as to intimate that this opinion would be entertained the more confidently as the electrician forming his decision should be better acquainted with the subject. I advanced what appeared to me unanswerable objections to this conclusion, but such as were not deemed by him worthy of reply. Unduly confident in his postulate, Farraday first ascertained the greatest effect which could be produced by a certain number of turns of a powerful machine, with a fifty inch plate, in causing a deviation of the galvanometric needle, and then, comparing the quantity of zinc and water required to produce the same effect through galvanic action, by a rule-of-three statement the result above mentioned was obtained. In my view the error arose from overlooking the fact that in the one case the whole discharge was exercised in polarizing the ponderable matter, while in the other only a portion of the discharge was thus employed, being only a secondary effect of the polarization of the circumambient medium. Only that portion of the charge which was forced into an association with the ponderable matter, had any effect on the galvanometric needle.
1888. According to Gaziot’s experiments, a Grove’s battery of 320 pairs would not give a spark before contact at any distance, although frictional machines, proportionally powerful, have given sparks at twenty inches.
1889. Thus the laws of conduction and insulation, as respects the two kinds of electricity in question, are different; the waves of polarization are in the case of the galvanic circuit confined to absolute contact with conducting ponderable matter. It cannot pass through the electrical medium or the air by the disruptive process. When once a passage has been made for it, it may pass convectively, carrying with it the polarizable matter, as may be seen in the arch formed between the poles of a powerful voltaic series after contact.
1890. This arch cannot be formed between two metallic points, because none but those of a most fixed and infusible nature can support the heat produced. It is only between charcoal points that it can be created, because no other competent conductor is infusible at the temperature of its volatilization. It is in fact only by the process in question, that charcoal can be volatilized per se. It may be inferred that as those waves of electro-polarity which require the presence of ponderable as well as ethereal matter cannot pass over an interval without the assistance of ponderable matter such as is supplied by the coal. On contact with each other, the points completing the circuit are subjected to an intensity of the polarizing power which causes the carbon of the points, in the state of vapour, to become associated with the ethereal waves, and thus produces the flaming arch, which distinguishes the scene of reciprocal neutralization.
Of Mind, as existing independently, and as distinguished from Matter.
1891. Three ideas must coexist in every rational being; nihility, mind, and matter. We can, of course, conceive of a perfectly void space, and likewise of a mathematical point, which designates a position not an entity. Yet, position cannot be determined without surrounding entities, between which this point exists, without having claim to any portion of those entities, whether there be only one actual material surface, or where several are cornered together. Of such points we have already treated, as forming at the immovable centre of a rotating mass, so that a centre is, of course, one state of the existence of such a point.
1892. After the considerations already presented, it will be seen that there is great difficulty in conceiving of the existence of an atom of matter endowed with polarity, and of course with two centres of two analogous, but opposite and irreconcilable forces. And we must consider that there are more than fifty such heterogeneous elementary atoms, all endowed with various degrees of affinity, so as that two may unite energetically to the exclusion of a third. This is designated as a case of decomposition, and may be exemplified by the process in which water is explosively decomposed by potassium, with which the oxygen of the water unites to the exclusion of hydrogen. When we see that from seven parts, by weight, of charcoal, and about nine parts of water, sugar ensues; that the sweetness with which this sugar is endowed, is the result of a difference between this substance and starch, in the proportion of the watery elements: starch consisting of less water than sugar, with the same amount of charcoal; when we learn that twelve parts, by weight, of charcoal, fourteen parts of nitrogen, and one of hydrogen, constitute the deadly prussic acid; and when, in fact, we discover that the atoms of matter which compose our flesh are capable of entering into as many active chemical combinations as the beads of a kaleidoscope can be productive of figures, then it will be manifest that the phenomena characterizing what we call matter, as well as the powers of that matter, are such as to prove our utter incapacity to comprehend the powers and properties of material atoms, and that we must not object to any wonder that nature may produce, because it is beyond our comprehension.[43]
1893. The belief in the powers displayed by matter does not then result from their being explicable, but from their being evident, just as the elaboration of the chick from the egg demonstrates the fact that the yolk and the white have been converted into a chicken without our being enabled to comprehend the process by which it has been effected. Such being the imperfection of our knowledge respecting the intricate nature of matter and its reactions, it seems to me inconsistent that there should have been such backwardness to believe in the independent existence of mind, of which the phenomena and properties are quite as evident as those of matter, the mode of existence and operation in either case being inscrutable.
1894. The great distinction between mind and matter is the presence of will on the one side, and the absence of it upon the other. Vis inertiæ is the antipodes of will; and if gravitation have any association with will, it will be that of the Creator; but in the inert mass actuated, it serves only to add to the evidence of incapability of self-actuation.