TRANSLATOR'S PREFACE. 



Vll 



It is to be feared that many of my readers may consider 

 an apology to be necessary on my part fur the style of the 

 translation, and think that I might have followed the German 

 less closely with advantage ; the nature of the subject, how- 

 ever, inyolying as it does such very minute descriptions, and 

 the constant repetition of the same terms, added to the im- 

 possibility of doing justice to the Author's close deductions in 

 any other form than a literal translation, necessitated a much 

 more rigid adherence to the original text, than I should have 

 thought requisite under any other circumstances. 



The Plates have been most faithfully copied from the 

 originals by Mr. Henry Adlard. 



HENRY SMITH. 



Henrietta Street, Cavendish Square : 



November 30///. J 84 7. 



