rill CONTENTS. 



CHAPTEB PAUB 



xvi. FIRE-BALLS .... .216 



xvii. SHOWERS OF SHOOTING STARS . . . .228 



xvin. THE NUMBER OF THE STARS .... 248 



xix. THE EXTENT OF THE SIDEREAL HEAVENS . . 255 



xx. THE MOVEMENTS OF THE ST/J&S . . ,261 



xxi. PHOTOGRAPHING THE STARS . . .292 



xxii. AN ASTRONOMER'S THOUGHTS ABOUT KRAKATOA 319 



xxin. DARWINISM AND ITS RELATION TO OTHER 



BRANCHES OF SCIENQB , 343 



