xl Introduction 



Nature with the same frank, unprejudiced, first-hand view, 

 asking her questions, and letting her answer them herself, instead 

 of forcing a hasty answer upon her ; and then, whether you 

 succeed in "advancing science" or not, you will at least have 

 advanced our common humanity by the presence in its midst 

 of one more candid and single-hearted lover of truth and 

 beauty. 



4444 



444 



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4 



