CONTENTS. IX 



CHAPTEE VI. 



THE OUTER PLANETS. 



Physical condition of Jupiter Work of Zollner and Proctor 

 The red spot Satellites Discovery of fifth satellite 

 Sixth and seventh satellites Eings of Saturn : Bond, 

 Maxwell, Keeler Struve's theory Globe of Saturn 

 New satellites Uranus and its satellites Discovery of 

 Neptune Adams and Le Verrier Satellite Trans - 

 Neptunian planets ...... 103 



CHAPTEE VII. 



COMETS. 



Life and work of Olbers His repulsion theory Life and 

 work of Encke His comet Biela's comet Faye's comet 

 Eeturn of Halley's comet Donati's comet Comet of 

 1861 Spectroscopic study of comets Theory of Bredik- 

 hine Spectra of comets Comets of 1880 and 1882 The 

 capture theory Cometary photography . . .123 



CHAPTEE VIII. 



METEORS. 



Meteoric shower of 1833 Work of Olmsted Work of Erman 

 and Kirkwood Of H. A. Newton Adams and the 

 meteoric orbit Shower of 1866 Connection of comets 

 and meteors Work of Schiaparelli Shower of meteors in 

 1872 'Le Stelle Cadenti' Meteoric observation A. S. 

 Herschel Work of Denning Stationary radiants 

 Bolides and aerolites Origin of aerolites . . .138 



