CHAPTER III.

The Pythagorean Philosophy.

1. Natural Philosophy 72–80 1. The Sources 72 2. Mathematical Studies 73 3. Natural Science 75 4. Medicine 76 5. Razi 77 6. The Dahrites 80

2. The Faithful Brethren of Basra 81–96 1. The Karmatites 81 2. The Brethren and their Encyclopaedia 82 3. Eclecticism 84 4. Knowledge 85 5. Mathematics 87 6. Logic 89 7. God and the World 90 8. The Human Soul 92 9. Philosophy of Religion 93 10. Ethics 94 11. Influence of the Encyclopaedia 95