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rently anomalous, are brought together, and are 

 shown to be but modifications of one and the same 

 principle. Natural history alone has hitherto re- 

 mained unhonoured by such names. Linnaeus 

 saw the station which his favourite science should 

 hold, but, with so few materials and facts before him, 

 he wisely abstained from attempting philosophic 

 generalisations. Much, indeed, has been said, by 

 those who should have known better, about what has 

 been termed the law of co-relation, of which a late 

 celebrated naturalist of France has been extolled as 

 the discoverer, but which has been known to every 

 naturalist since the days of Aristotle ; this law of 

 co-relation being, in fact, no other than that the 

 structure of an animal is adapted to its economy 

 and habits. 



(259.) Such being the state of the philosophy of 

 zoology, can we imagine, that if its cultivation had 

 been fostered, it would not have reached a higher 

 altitude in the rank of the demonstrative sciences ? 

 Are we to suppose, for a moment, that it is exempt 

 from the influence of definite laws, and that the 

 almost infinite variety of form and structure in the 

 objects it embraces, cannot be reduced to a few pri- 

 mary types, or that the mode of their variation is 

 fluctuating and indefinite? If we reject all such sup- 

 positions, as being at variance with the whole analogy 

 of nature, under what circumstances can we suppose 

 such discoveries are most likely to be made ? Cer- 

 tainly by those whose minds have been disciplined 

 in the universities, and who have not only acquired 

 a love for abstract truth, but who are qualified to 

 pursue it in a philosophic spirit. Now, if the very 



