CHARACTERS OF MINERALS. 3 
of minerals there is also (4) that of Descriptive MINERALOGY, 
under which are included descriptions of the mineral species ; 
and (5) that of Derermrnative MineraLocy, which gives a 
systematic review of the methods for determining or distinguish- 
ing minerals. 
These different branches of the subject are here taken up in 
the following order: I. Crystallographic Mineralogy; II. Phys- 
ical Mineralogy; III. Chemical Mineralogy; IV. Descriptive 
Mineralogy ; V. Determinative Mineralogy. On account of 
the brief manner in which the subjects are treated in this 
volume, the heads used for the several parts are, (1) Zhe Crys- 
tallization of Minerals ; (2) Physical Properties of Minerals ; 
(3) Chemical Pr operties of Minerals ; (4) Descriptions of Spe- 
eves » (5) Determination of Miner aS 
