xii INTRODUCTION. _ee 
- ‘s* ¥ » % 
= 3 , “en 
___ In the present edition, the whole work has be carefully — 
~ revised and improved ; and several considerable and impor- 
tant additions have been made. * . + at 
I have only to add, that I have spared no pains to render 
the work as perfect as I could make it. The engravings have 
been made here from drawings of specimens previously pre- 
pared, and I can therefore vouch for their accuracy. ie 
1. Wed 
Bayswater, Dec. 16, 1840 
