CHAPTER III. 

 THE LIMITS OF PHYSICAL SCIENCE. 



THE Physical Sciences have advanced with such 

 rapidity, and have succeeded in so large a number 

 of instances in unifying what appeared to be alto- 

 gether separate classes of facts by the discovery of 

 their law, that at first sight it seems reasonable to 

 hope for a still wider unification embracing all de- 

 partments of truth. 



" The truths of philosophy bear the same relation 

 to the highest scientific truths, that each of these 

 bears to lower scientific truths. As each widest 

 generalization of science comprehends and consolidates 

 the narrower generalization of its own division; so 

 the generalizations of philosophy comprehend and 

 consolidate the widest generalizations of Science. It 

 is therefore a knowledge the extreme opposite in kind 

 to that which experience first accumulates. It is the 

 final product of that process which begins with a mere 

 ^colligation of crude observations, goes on establish- 

 ing propositions that are broader and more separated 

 from particular cases, and ends in universal proposi- 

 tions. Or, to bring tbfe definition to its simplest and 



