OP NATURAL PHILOSOPHY. 103 



one or the other may afford facilities in any case ; 

 but it will naturally happen that, where facts 

 are numerous, well observed, and methodically 

 arranged, the former will be more applicable than 

 in the contrary case : the one is better adapted to 

 the maturity, the other to the infancy, of science : 

 the one employs, as an engine, the division of 

 labour ; the other mainly relies on individual pene- 

 tration, and requires a union of many branches of 

 knowledge in one person. 



