X LIST OF ILLUSTRATIONS. 



MM 



VIEW OF MARS 155 



WEIGHING THE PLANETS 174 



ORBITS OF JUPITER AND THE EARTH . . . .181 

 COMPARATIVE SIZES OF THE SUN AND THE PLANETS . 183 



VIEWS OF JUPITER 185 



KRAKATOA : ERUPTION OF, AUGUST 26-27 . , . 333 

 KRAKATOA : PROGRESS OF SKY PHENOMENA . . .336 

 KRAKATOA : NORTHERN LIMIT OF SKY PHENOMENA . 339 



