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SELECTED ARTICLES. 
FIRST CATEGORY. 
First Group. 
Mixtures which take the pilular consistence, and which 
preserve it indefinitely: 
Dragon's-blood, Assafcetida, 
Guaiacum, Galbanum. 
Second Group. 
Mixtures which, in the first place, having a pilular consist- 
ence, ultimately become soft from exposure to the air: 
Benzoin, Gum ammoniac, 
Balsam of Tolu, Mastic. 
Third Group. 
Mixtures of a semi-liquid consistence: 
Sagapenum, Anime. 
Fourth Group. 
Mixtures which present a pulverulent form, somewhat 
granulated, and which retain it: 
Olibanum, Bdellium, 
Opopanax, Myrrh, 
Gamboge, Amber, 
Euphorbium. 
Fifth Group. 
Mixtures which indefinitely retain the pulverulent form: 
Tacamahaca, Sandarach, 
Resin of jalap, Resinoid matter of cinchona. 
SECOND CATEGORY. 
First Group. 
Mixtures in which the odor of camphor is absorbed, the 
substance added retaining its own peculiar odor: 
