THE NATURAL ARRANGEMENT. XXI 



Order II. BARYTE.' (M.) 

 Unmetallic. Streak uncolored, or orange-yellow. 

 H. 2-5... 6-0. 

 G. 3-3... 7-3. 



Order III. K E RATE. 3 (M.) 

 Unmetallic. Streak uncolored. 

 H. 1-0. ..2-0. 

 G. 5-5... 6-5. 



Order IV. MICA. (M.) 



Cleavage monotomous. 4 

 H. 1-0... 4-5. 

 G. 1-8... 3-4. 



Order V. PICROSMINE. S (S.) 

 When moistened, emits an argillaceous odor. 

 H. 2-0... 3-0. 



G. 2-0... 2-8. 



Order VI. SPAR. (M.) 

 Unmetallic. 

 H. 3-5... 7-0. 

 G. 2-0... 3-7. 



2 Boeder, heavy. 



3 Ks'gac;, horn. 



' 4 M6vo, single, and TSJAVGJ, / cleave, implying that the 

 cleavage is distinct only in a single direction. 



5 IIxo, bitter, and otf^, odor, in allusion to the smell 

 when moistened. 



