manner in which we apprehend that phenomenon, since it exerts no power and no influence upon the phenomenon itself; for what does not act is not.
We have a natural inclination whenever it is possible to explain every natural phenomenon mechanically; doubtless because mechanics calls in the assistance of the fewest original, and hence inexplicable, forces, and, on the other hand, contains much that can be known a priori, and therefore depends upon the forms of our own intellect, which as such carries with it the highest degree of comprehensibility and clearness. However, in the “Metaphysical First Principles of Natural Science” Kant has referred mechanical activity itself to a dynamical activity. On the other hand, the application of mechanical explanatory hypotheses, beyond what is demonstrably mechanical, to which, for example, Acoustics also belongs, is entirely unjustified, and I will never believe that even the simplest chemical combination or the difference of the three states of aggregation will ever admit of mechanical explanation, much less the properties of light, of heat, and electricity. These will always admit only of a dynamical explanation, i. e., one which explains the phenomenon from original forces which are entirely different from those of impact, pressure, weight, &c., and are therefore of a higher kind, i. e., are more distinct objectifications of that will which obtains visible form in all things. I am of opinion that light is neither an emanation nor a vibration; both views are akin to that which explains transparency from pores and the evident falseness of which is proved by the fact that light is subject to no mechanical laws. In order to obtain direct conviction of this one only requires to watch the effects of a storm of wind, which bends, upsets, and scatters everything, but during which a ray of light shooting down from a break in the clouds is entirely undisturbed and steadier than a rock, so that with great directness it imparts to us the knowledge that it belongs to another order of things than the mechanical: it stands there unmoved like a ghost. Those constructions of light from molecules and atoms which have originated with the French are indeed a revolting absurdity. An article by Ampère, who is otherwise so acute, upon light and heat, which is to be found in the April number of the “Annales de chimie et physique,” of 1835, may be considered as a flagrant expression of this, and indeed of the whole of atomism in general. There the solid, the fluid, and the elastic consist of the same atoms, and all differences arise solely from their aggregation; nay, it is said that space indeed is infinitely divisible, but not matter; because, if the division has been carried as far as the atoms, the further division must fall in the spaces between the atoms! Light and heat, then, are here vibrations of the atoms; and sound, on the other hand, is a vibration of the molecules composed of the atoms. In truth, however, these atoms are a fixed idea of the French savants, and therefore they just speak of them as if they had seen them. Otherwise one would necessarily marvel that such a matter-of-fact nation as the French can hold so firmly to a completely transcendent hypothesis, which is quite beyond the possibility of experience, and confidently build upon it up to the sky. This is just a consequence of the backward state of the metaphysics they shun so much, which is poorly represented by M. Cousin, who, with all good will, is shallow and very scantily endowed with judgment. At bottom they are still Lockeians, owing to the earlier influence of Condillac. Therefore for them the thing in itself is really matter, from the fundamental properties of which, such as impenetrability, form, hardness, and the other primary qualities, everything in the world must be ultimately explicable. They will not let themselves be talked out of this, and their tacit assumption is that matter can only be moved by mechanical forces. In Germany Kant's teaching has prevented the continuance of the absurdities of the atomistic and purely mechanical physics for any length of time; although at the present moment these views prevail here also, which is a consequence of the shallowness, crudeness, and folly introduced by Hegel. However, it cannot be denied that not only the evidently porous nature of natural bodies, but also two special doctrines of modern physics, apparently render assistance to the atomic nuisance. These are, Hauz's Crystallography, which traces every crystal back to its kernel form, which is an ultimate form, though only relatively indivisible; and Berzelius's doctrine of chemical atoms, which are yet mere expressions for combining proportions, thus only arithmetical quantities, and at bottom nothing more than counters. On the other hand, Kant's thesis in the second antinomy in defence of atoms, which is certainly only set up for dialectical purposes, is a mere sophism, as I have proved in my criticism of his philosophy, and our understanding itself by no means leads us necessarily to the assumption of atoms. For just as little as I am obliged to think that the slow but constant and uniform motion of a body before my eyes is composed of innumerable motions which are absolutely quick, but broken and interrupted by just as many absolutely short moments of rest, but, on the contrary, know very well that the stone that has been thrown flies more slowly than the projected bullet, yet never pauses for an instant on the way, so little am I obliged to think of the mass of a body as consisting of atoms and the spaces between them, i. e., of absolute density and absolute vacuity; but I comprehend those two phenomena without difficulty as constant continua, one of which uniformly fills time and the other space. But just as the one motion may yet be quicker than another, i. e., in an equal time can pass through more space, so also one body may have a greater specific gravity than another, i. e., in equal space may contain more matter: in both cases the difference depends upon the intensity of the acting force; for Kant (following Priestley) has quite correctly reduced matter to forces. But even if the analogy here set up should not be admitted as valid, and it should be insisted upon that the difference of specific gravity can only have its ground in porosity, even this assumption would always lead, not to atoms, but only to a perfectly dense matter, unequally distributed among different bodies; a matter which would certainly be no longer compressible, when no pores ran through it, but yet, like the space which it fills, would always remain infinitely divisible. For the fact that it would have no pores by no means involves that no possible force could do away with the continuity of its spatial parts. For to say that everywhere this is only possible by extending the already existing intervals is a purely arbitrary assertion.
The assumption of atoms rests upon the two phenomena which have been touched upon, the difference of the specific gravity of bodies and that of their compressibility, for both are conveniently explained by the assumption of atoms. But then both must also always be present in like measure, which is by no means the case. For, for example, water has a far lower specific gravity than all metals properly so called. It must thus have fewer atoms and greater interstices between them, and consequently be very compressible: but it is almost entirely incompressible.
The defence of atoms might be conducted in this way. One may start from porosity and say something of this sort: All bodies have pores, and therefore so also have all parts of a body: now if this were carried out to infinity, there would ultimately be nothing left of a body but pores. The refutation would be that what remained over would certainly have to be assumed as without pores, and so far as absolutely dense, yet not on that account as consisting of absolutely indivisible particles, atoms; accordingly it would certainly be absolutely incompressible, but not absolutely indivisible. It would therefore be necessary that it should be asserted that the division of a body is only possible by penetrating into its pores; which, however, is entirely unproved. If, however, this is assumed, then we certainly have atoms, i. e., absolutely indivisible bodies, thus bodies of such strong cohesion of their spatial parts that no possible power can separate them: but then one may just as well assume such bodies to be large as small, and an atom might be as big as an ox, if it only would resist all possible attacks upon it.
Imagine two bodies of very different kinds, entirely freed from all pores by compression, as by means of hammering, or by pulverisation; – would their specific gravity then be the same? This would be the criterion of dynamics.
Chapter XXIV. On Matter
Matter has already been spoken of in the fourth chapter of the supplements to the first book, when we were considering the part of our knowledge of which we are conscious a priori. But it could only be considered there from a one-sided point of view, because we were then concerned merely with its relation to the forms of our intellect, and not to the thing in itself, and therefore we investigated it only from the subjective side, i. e., so far as it is an idea, and not from the objective side, i. e., with
