11 



CONTENTS. 



Page 



V. Proper motion of the fixed stars, p. 178182 ; 



Problemetical existence of dark bodies, p. 182 

 185 ; Parallax and measured distances of some 

 of the fixed stars, p. 185 192 ; Motion of the 

 solar system, and doubts concerning the assump- 

 tion of a central body for the whole sidereal 

 heavens, p. 192198 . . . . . 178198 



VI. Double or multiple stars ; their number and 

 distances apart, and periods of revolution around 



a common centre of gravity .... 199214- 



NOTES. 



To Introduction . i ix 



To special results of observation ix 



To section I. x xiv 



To section II. . xiv xlv 



To section III. xlvi kvi 



To section IV ... kvi kx 



To section V. kx kxiv 



To section VI kxiv kxviii 



TABLES. 



Clusters of stars .... . 120123 



New stars . 138147 



Variable stars . . 163171 



Parallaxas ... 190 



Elements of the orbits of double stars . . . 214 



Photometric tables of stars . xlii xl 



