94 Dr J. B. Pearson, On the probable secular change [May 9, 



03. 



P 

 < 



o 



b 



P 

 <3 



■<* o 



CO CM 





l-H ■«* 



<M O 



►Q 00 



co o 



CM O 



?£> CO I» <0 t~ CO OC2 





d oo 



iO 



CM -f 

 CM 



-f 00 

 O i-O 



O — i it* i-H r-i CM 



3 | 



03 a a 



-S o 



.13 <u 



12 **> "S 





a ° is 



9 ci 3 





o 



8 



2 a « 



S 2 . 



5 a o 



8 *> 



- 



J J 



fc 1 1 



oa. 



About the date of the construction of Ptolemy's Catalogue of 

 Stars in its present form, fixed by Bode, the German astronomer, 

 at 63 A.D. (Knobel); or rather at the date A.D. 1 to which I have 

 reduced my own calculations, the star rj was about circumpolar 

 at Alexandria, being in North Dec. 58° 24'. The next lowest how- 

 ever, 7, was in 64° 14', and so easily circumpolar. Since that date 



