ADVERTISEMENT. Vil 
\ 
A knowledge of the simple and beautiful system of 
Linnzus is almost indispensable for acquiring a know- 
ledge of plants ; but to study Botany as a science,— 
to view plants as component parts of one great system, 
—to examine their mutnal relations and affinities, the 
connection between their internal structure and exter- 
nal characters, and between these and their properties, 
we must have recourse to the comprehensive and _ phi- 
losophical system of Jusstev. 
Till within these few years, almost all the elemen- 
tary works on Botany in this country were devoted 
chiefly to an exposition of the Linnean method of ar- 
ranging plants, and hence were very imperfect in a 
medical point of view, as it is only by means of the — e 
Natural Method that Botany, as a science, ean be ap- a 
plied to Medicine. Now, however, the importance of 
natural classification is beginning to be more highly 
estimated, and a knowledge of it is deemed essential 
to every student of Botany: the examination of the 
natural affinities of plants is the principal study of the 
most eminent botanists, both at home and abroad ; and 
the development of this system forms a prominent part 
in the best elementary works. It is hoped, therefore, : 
that a work which comprises in a small compass the 
z Anatomy and Physiology of Vegetables, the Princi- _ 
ples of Natural Arrangement with the Characters and _ 
edicinal History of the Natural Orders, and an ex- 
