Chapter x.
Leucippus—his Atomic Theory.
But Leucippus, an associate of Zeno, did not maintain the same opinion, but affirms things to be infinite, and always in motion, and that generation and change exist continuously. And he affirms plenitude and vacuum to be elements. And he asserts that worlds are produced when many bodies are congregated and flow together from the surrounding space to a common point, so that by mutual contact they made substances of the same figure and similar in form come into connection; and when thus intertwined,[1] there are transmutations into other bodies, and that created things wax and wane through necessity. But what the nature of necessity is, [Parmenides] did not define.
Chapter xi.
Democritus—his Duality of Principles—his Cosmogony.
And Democritus was an acquaintance of Leucippus. Democritus, son of Damasippus, a native of Abdera,[2] conferring with many gymnosophists among the Indians, and with priests in Egypt, and with astrologers and magi in Babylon, [propounded his system]. Now he makes statements similarly with Leucippus concerning elements, viz. plenitude and vacuum, denominating plenitude entity, and vacuum nonentity; and this he asserted, since existing things are continually moved in the vacuum. And he maintained worlds to be infinite, and varying in bulk; and that in some there is neither sun nor moon, while in others that they are larger than with us, and with others more numerous. And that intervals between worlds are unequal; and that in one quarter of space [worlds] are more numerous, and in another less so; and that some of them increase in bulk, but that others attain their full size, while others dwindle away; and that
