XII INTRODUCTIOX. 



matter of Schocpf and subsequent writers has 

 been incorporated. Nothing essential has been 

 omitted, but discussions arc avoided, and ex- 

 periments merely stated in result. 



73. This order and plan has enabled to give 

 a complete knowledge of the objects in all their 

 botanical, medical, chemical and historical 

 points of view: while tiie general principles of 

 the science are prefixed as preliminary guides. 



7-i. If this labour may suit all the classes of 

 readers and all those who employ medical 

 plants, the wishes and object of the author will 

 be fulfilled. 



