BOOK III.

LXXIII. Of existing things, some are divisible and some indivisible. Again, those which are divisible, consist either of similar or of dissimilar parts. Those which are indivisible are such as have no separate parts, and are not formed by any combination, such as unity, a point, or a sound. But those are divisible which are formed by some combination; as, for instance, syllables, and symphonies, and animals, and water, and gold. These too consist of similar parts, which are made up of particles resembling one another, and of which the whole does not differ from any part, except in number. As for instance, water and gold, and everything which is fusible, and so on. And these consist of dissimilar parts, which are made up of various things not resembling one another; as for instance, a house, and things of that sort; so that of existing things, some are divisible and others indivisible. And of those which