47 



TABLE. 



By the above formulae for any year, 1755 ^t- n 



log. (AD+r) = log. » + I.294'510. 



Example. To find the mean declination of 

 the Pole Star, January I, 1800, 



log. (AD+r) = 2.91772 =log. 886",6, 



or 



» 11/ 



a2> = 886,6 — 3,8 = 14. 43,3 

 Declination, 1755 . . 87 59 41,1 



Declination, January 1, 1800, 88 14 24,4 



The following comparisons shew the differences between the 

 observed and computed declinations. The computed declinations 

 are those deduced in the above manner from the Greenwich de- 

 clinations in 1755, and Dublin, 1821 : - 



VOL. XV. 



