ZOOLOGICAL REMARKS. 



31 



But the utility of these sciences does not stop here ; 

 in an educational point of view, their study accustoms the 

 mind to proceed from effect to cause, testing each hypo- 

 thesis by an appeal to facts. Finally, before all other 

 studies, that of Natural History trains the mind to method, 

 that part of logic without which all investigation is labori- 

 ous, every exposition obscure, (e) 



(e) " Manual of Zoology." Milne Edwards. 



