18 INTRODUCTION. . 19. 



Most of the works relating to the subject of the Mineral 

 System, and Classification in general, require the utmost 

 attention on the part of the beginner, who intends to per- 

 use them. 



As to the principles of Nomenclature and the Characte- 

 ristic, the study of the works of Linnaeus is particularly to 

 be recommended, and, above all, of his Philosophia Bota- 

 nica and Critica Botanica. 



In the second volume of this Treatise, those works are 

 quoted, which regard the Descriptive part of Mineralogy, 

 and which partly also have been referred to in the descrip- 

 tions of the single species. 



