the atom and the vacuum are just such simple Notions. But we cannot here see or find more than the formal fact that quite general and simple principles, the antithesis between the one and continuity, are represented. If we proceed from a wider, richer point of view in nature, and demand that from the atomic theory, it, too, must be made comprehensible, the satisfaction at once disappears and we see the impossibility of getting any further. Hence we must get beyond these pure thoughts of continuity and discontinuity. For these negations, the units, are not in and for themselves; the atoms are indivisible and like themselves, or their principle is made pure continuity, so that they may be said to come directly into one clump. The conception certainly keeps them separate and gives them a sensuously represented Being; but if they are alike, they are, as pure continuity, the same as what is empty. But that which is, is concrete and determined. How then can diversity be conceived of from these principles? Whence comes the determinate character of plants, colour, form? The point is, that though these atoms as small particles may be allowed to subsist as independent, their union becomes merely a combination which is altogether external and accidental. The determinate difference is missed; the one, as that which is for itself, loses all its determinateness. If various matters, electrical, magnetic and luminous, are assumed, and, at the same time, a mechanical shifting about of molecules, on the one hand unity is quite disregarded, and, on the other, no rational word is uttered in regard to the transition of phenomena, but only what is tautological. Since Leucippus and Democritus wished to go further, the necessity of a more definite distinction than this superficial one of union and separation was introduced, and they sought to bring this about by ascribing diversity to atoms, and, indeed, by making their diversity infinite. Aristotle (Met. I. 4) says: “This diversity they sought to determine in three ways. They say that atoms differ in figure, as A does from N; in order” (place) “as AN from NA; in position”—as to whether they stand upright or lie—“as Z from N. From these all other differences must come.” We see that figure, order and posture are again external relationships, indifferent determinations, _i.e._ unessential relations which do not affect the nature of the thing in itself nor its immanent determinateness, for their unity is only in another. Taken on its own account, this difference is indeed inconsistent, for as the entirely simple one, the atoms are perfectly alike, and thus any such diversity cannot come into question.