vr Preface. 



In neither part of this undertaking can I hope to have escaped 

 many a blunder. It is indeed the consciousness of this that has 

 caused me to keep the following sheets in my desk unpublished, 

 though written many years ago. And even now, when I have 

 been induced by friends to venture on publication, I do so 

 with extreme diffidence and misgiving. Of this, however, I feel 

 assured ; that those persons, who are most competent to detect 

 my shortcomings, will also be those most disposed to make full 

 allowance for them. For they will best know, how difficult a 

 task the preparation of a volume of this kind is in reality, easy 

 and simple as it may seem to one who has never tried it. 



THE TRANSLATOR. 



N.B. — The references in the introductory essays and in the 

 notes are to Bekker's octavo edition of Aristotle, published by 

 the Clarendon Press. At the bottom of each page of the trans- 

 lation there has also been added a reference to the correspond- 

 ing place in the Berlin quarto edition. 



