40 



subject should be attentively considered; 

 but for such an examination 1 have no 

 time; neither would it be considered as 

 suitable to the general design of these 

 lectures. 



Whatever notions philosophers may be 

 pleased to form respecting matter in ge- 

 neral, it does not appear to me that our 

 physiological opinions can be affected by 

 their decisions. Of the matter which for 

 the most part presents itself to our notice, 

 and is cognizable by the eye and touch, \ve 

 know that it has a property called by 

 Sir Isaac Newton vis inertia, an indis- 

 position to move unless impelled to motion, 

 and a disposition to continue in motion un- 

 less retarded. 



There are some philosophers who 

 think, that properties similar to those 

 which in the aggregate mass become an 



