PREFACE. IX 



is at present involved in doubt, and the accuracy of 

 some of the conclusions of physiologists is inferred 

 rather than demonstrated ; so that it has been found 

 essential that the grounds of the more popularly re- 

 ceived opinions, whether admitted as true or rejected 

 as erroneous, should be given at length. 



Next follows GLOSSOLOGY (Book III.) ; or, as it was 

 formerly called, TERMINOLOGY ; restricted to the defini- 

 nition of the adjective terms, which are either used 

 exclusively in Botany, or which are employed in that 

 science in some particular and unusual sense. The key 

 to this book, as also to the substantive terms explained 

 in Organography, will be found in a copious index. 



It has been my wish to bring every subject that I v 

 have introduced down, as nearly as possible, to the state 

 in which it is found at the present day. In doing so, I 

 have added so very considerable a quantity of additional 

 matter, especially in what relates to Vegetable Anatomy 

 and Physiology, that the present edition may be con- 

 sidered, in those respects, a new work. 



In the course of the following pages I have made fre- 

 quent use of many valuable translations to be found in the 

 Annals of Natural History, a periodical of the highest 

 merit, to which all naturalists should have access. In 

 every case it has been my anxious wish to render 

 credit to all persons for their discoveries ; and if I have 

 on any occasion either omitted to do so, or assumed 

 to myself observations which belong to others, it has 

 been unknowingly or inadvertently. It is, however 

 impracticable, and if practicable it would not be worth 

 while, to remember upon all occasions from what 

 particular sources information may have been derived. 



VOL. I. b 



