172 INTRODUCTORY. 



inquiry into their moving cause, and would moreover if 

 published alone have a tendency injurious to others as 

 well as to myself. And should the critic scruple to ad- 

 mit the full efficacy of this apology, I shall finally shelter 

 myself under the excellent observation of Mr. Hume : 

 " That all the sciences have a relation to human nature, 

 and however wide any of them may run from it, they 

 still return by one passage or other." 



