1. Beliefs and superstitions relative to comets
2. Cometary astronomy up to the time of Newton
3. The motions and orbits of comets
4. Periodical comets
5. Periodical comets
6. The world of comets and cometary systems
7. Physical and chemical constitution of comets
8. Physical transformations of comets
9. Mass and density of comets
10. The light of comets
11. Theory of cometary phenomena
12. Comets and shooting stars
13. Comets and the earth
14. Physical influences of comets
15. Some questions about comets
Tables.

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