[Footnote 211: Aristotel. Gen. et Corr. i. 8, p. 325, a. 29. [Greek: A)/peira to\ plê=thos kai\ a)o/rata dia\ smikro/têta tô=n o)/gkôn], &c. Marbach observes justly that the Demokritean atoms, though not really objects of sense in consequence of their smallness (of their disproportion to our visual power), are yet spoken of as objects of sense: they are as it were microscopic objects, and the [Greek: gnêsi/ê gnô/mê], or intelligence, is conceived as supplying something of a microscopic power. (Marbach, Lehrbuch der Geschichte der Philosophie, sect. 58, vol. i. p. 94.)] [Side-note: No separate force required to set the atoms in motion--they moved by an inherent force of their own. Like atoms naturally tend towards like. Rotatory motion, the capital fact of the Kosmos.] How this was done we cannot clearly make out, not having before us the original treatise of Demokritus, called the Great Diakosmos. It is certain, however, that he did not invoke any separate agency to set the atoms in motion--such as the Love and Discord of Empedokles--the Nous or Intelligence of Anaxagoras. Demokritus supposed that the atoms moved by an inherent force of their own: that this motion was as much without beginning as the atoms themselves:[212] that eternal motion was no less natural, no more required any special cause to account for it, than eternal rest. "Such is the course of nature--such is and always has been the fact," was his ultimatum.[213] He farther maintained that all the motions of the atoms were necessary--that is, that they followed each other in a determinate order, each depending upon some one or more antecedents, according to fixed laws, which he could not explain.[214] Fixed laws, known or unknown, he recognised always. Fortune or chance was only a fiction imagined by men to cover their own want of knowledge and foresight.[215] Demokritus seems to have supposed that like atoms had a spontaneous tendency towards like; that all, when uncombined, tended naturally downwards, yet with unequal force, owing to their different size, and weight proportional to size; that this unequal force brought them into impact and collision one with another, out of which was generated a rotatory motion, gradually extending itself, and comprehending a larger and larger number of them, up to a certain point, when an exterior membrane or shell was formed around them.[216] This rotatory motion was the capital fact which both constituted the Kosmos, and maintained the severance of its central and peripheral masses--Earth and Water in the centre--Air, Fire, and the celestial bodies, near the circumference. Demokritus, Anaxagoras, and Empedokles, imagined different preliminary hypotheses to get at the fact of rotation; but all employed the fact, when arrived at, as a basis from which to deduce the formation of the various cosmical bodies and their known manifestations.[217] In respect to these bodies--Sun, Moon, Stars,