284 



CATALOGUE OF POLAR STARS. 



^^=+ 0.60008334 



A. = - 0.00203746 s. s. 



0.00008334 „„„„„,„, 



A„ = - 0.30237888 + ^, - 0.30237194 



Ai= +73.51432400 - 

 We have therefore : 



12 



0.00203746 



= +73.51398442 



Epoch. a 



h- m. s. 



1875.0 7 29 5.63100000 



1876.0 7 30 18.99379845 



A, As A, 



+ 73!51398442 -0;30237194 -0.00203740 



+ 73.30279845 -0.00199580 



- 0.30436774 



+ 0!00008334 



The summation in either direction from 1875 may now be continued by the 

 successive additions or subtractions of the differences. 



The application of this method will be illustrated by the computation of a for 

 each year from 1875 to 1899. 



