vi 



PREFACE. 



adhered to in both instances. In the present arrangement 

 of the plates, and consequently of the letter-press, some 

 deviation has been made from the original plan ; which, as 

 the work came out in numbers, aimed at giving a variety of 

 subjects in each, in order to avoid any appearance of mono- 

 tony ; but as in the present form the whole is brought before 

 the eye at once, it has been deemed advisable to place all the 

 specimens of each description of tree together, as thereby 

 enabling a more accurate idea to be formed of their compa- 

 rative sizes and characteristics. In all other respects, it is 

 hoped that every thing which may wear the aspect of 

 alteration, will be better explained by the term addition or 

 amendment. 



Hammersmith, May 25, 1830. 



