VI.—THE ELEATICS 27 1. The Relation of the Eleatic Principle to the Pythagorean 27 2. Xenophanes 28 3. Parmenides 28 4. Zeno 30 VII.—HERACLITUS 31 1. Relation of the Heraclitic Principle to the Eleatic 31 2. Historical and Chronological 32 3. The Principle of the Becoming 32 4. The Principle of Fire 33 5. Transition to the Atomists 33 VIII.—EMPEDOCLES 35 1. General View 35 2. The Four Elements 35 3. The Two Powers 36 4. Relation of the Empedoclean to the Eleatic and Heraclitic Philosophy 36 IX.—THE ATOMISTIC PHILOSOPHY 37 1. Its Propounders 37 2. The Atoms 37 3. The Fulness and the Void 38 4. The Atomistic Necessity 38 5. Relative Position of the Atomistic Philosophy 39 X.—ANAXAGORAS 40 1. His Personal History 40 2. His Relation to his Predecessors 41 3. The Principle of the νοῦς 41 4. Anaxagoras as the close of the Pre-Socratic Realism 42