[Temporary Stars, Meteors, and Comets] 187

CHAPTER VIII.

[The Phenomena of Comets] 210

CHAPTER IX.

[Interpretation of Cometic Phenomena] 225

CHAPTER X.

[The Resolvable Nebulæ, Star-Clusters and Galaxies] 237

CHAPTER XI.

[The Gaseous Nebulæ] 253

CHAPTER XII.