CONTENTS. V 



Section II. Natural and telescopic vision, p. 43 67. Scin- 

 tillation of stars, p. 6771. Velocity of light, p. 71 

 78. Photometric results, p. 7885 . . . 4385 



Notes . . , , * , . . xiv. xlv. 



Section III. Number, distribution, and colour of the fixed 

 stars, p. 86118. Clusters of stars, p. 119123. 

 Milky Way, p. 124131 . . . 86131 



Notes xlvi. Ixvi. 



Section IV. Newly appeared and vanished stars, p. 132 

 147. Variable stars, with recurring and measured pe- 

 riods, p. 147171. Variation of light in celestial bodies 

 of which the periodicity has not yet been investigated, 



171177 132177 



Notes Ixvi. Ixx. 



Section V. Proper motion of the fixed stars, p. 178 182. 

 Problematical existence of dark bodies, p. 182 185. 

 Parallax and measured distance* of some of the fixed 

 stars, p. 185192. Motion of the solar system, p. 193 

 198 .;....... 178198 



Notes . . . . . . . . Ixx. Ixxiv. 



Section VI. Double or multiple stars ; their number and dis- 

 tances apart, and periods of revolution around a common 



centre of gravity 199 214 



Notes Ixxiv. Ixxviii. 



Section VII. The nebulse. Whether all nebulae are merely 

 remote and very dense clusters of stars, p. 215 246. 

 The two Magellauic clouds in which nebulae and nume- 

 rous clusters of stars are crowded together, p. 246 254. 

 The black patches or " coal-sacks" of the southern celes- 

 tial hemisphere, 254 257 215258 



Notes Ixxviii. xcii. 



