1. The ideas of the ancients on music.
2. The true cause of the moral effects of music.
3. Why the principles of music have remained unknown; vicissitudes of this science; origin of the modern system.
5. Etymology of the word "music"; number considered as musical principle.
6. Survey of sacred music.
7. Survey of celestial music.
8. The musical system of the Chinese.
9. The musical system of the Greeks.
10. The musical system of the Eastern Christians.
11. Definition of melody; how it is produced and modified.
12. Advice to young composers concerning imitation in music.
