Cornford's interpretation of Anaxagoras' theory of matter (C.Q. xxiv [1930] 14 ff. and 83 ff.) was an attempt to solve the apparent contradiction between the Principle of Homoeomereity, as he calls it, and that which asserts that ‘there is a portion of everything in everything’; and also, perhaps, to assign a more definite place in the system to the qualitative ‘Opposites’ which Tannery and Burnet had asserted, in rather vague terms, to be Anaxagoras' elements. In effect he solves the problem by applying the former principle to the phenomenal world and to the Seeds which are the elements for Anaxagoras, and confining the latter, the principle of Universal Mixture as we may call it, to the Opposites, which are the substantial but inseparable constituents of the Seeds. By this tidy and ingenious solution he avoids not only the above-mentioned contradiction but also what he calls the grotesque and gratuitous absurdity of holding that a Seed of gold contains mostly gold, but also flesh and all other natural substances, in order to explain the possibility of various changes, the great majority of which never occur anyhow (gold, for instance, does not turn into flesh).