[ ^6 ] 



the moon will be 40' 52"' 52.'% and the whole preceffion, arifing 

 from both caufes conjoined, will be 50" o" 12", according to 

 obfervation. 



To this objedion a fatisfadory anfwcr is fuggefted by Newton 

 himfelf, where he fays, that the preceffion will be diminilhed 

 if the matter of the earth be rarer at the circumference than 

 at the centre. The rcafon of which is evident from what has 

 been already dcmonftrated, for the quantity of matter in the 

 earth being given, the diftance of the centre of gyration from 

 the centre of the earth will be lefs, the more the matter of the 

 earth is accumulated towards the centre, and therefore the lefs 

 will be the angular motion generated by the fun and moon. 



