THE SUN AND FIXED STABS. 195 



infers that their linear motions are equal. This he found 

 to be true for stars situated in every direction of the 

 heavens, by a comparison of the proper motions of the 

 stars in the different hours of right ascension. 



The following table is founded on an examination of 

 the proper motions of the stars of different magnitudes as 

 deduced by M. Struve. 



MEAN MOTION IN ONE HUNDRED YEARS. 



Magnitude. Isolated Stars. Binary Stars. 



R.A. Dec. R.A. Dec. 



1 . . 34".2 29".0 . . 55".5 47".0 



2 . . 18".9 16".l . . 30".8 26".l 



3 . . 12'U 10".5 . . 20".l 17".0 



4 . . 8".f V'A . . 14".2 12". 



5 . . 6".3 5".3 . . 10".2 8".6 



6 . . 3".Y 3".l . . 6".0 5".l 



7 . . 2".2 1".8 . . 3".5 3".0 



8 . . 1".4 1".2 . . 2".3 2 .0 



9 . . 1".0 0".9 1'.7 1".5 



