TABLES FOR THE DETERMINATION OF 

 MINERALS. 



In the following tables, the more common mineral species 

 (comprising all the American) are arranged in subdivisions, 

 to afford aid in ascertaining the names of species. These 

 tables will be found valuble as a means of instruction ; the 

 ttse of them fixes the attention on distinctive characters, and 

 hereby impresses the peculiarities of species on the mind. 



A general view of the arrangement in Table I. is here 

 annexed. 



I. — Soluble Minerals. 



A. No effervescence with muriatic acid. 



a. No deflagration on burning coals. 



b. Deflagration on burning coals. 



B. Effervesce with muriatic acid when heated, if not without. 



II. — Insoluble Minerals. 



Luster unmetallic. 



A. Streak uncolored. 



a. No odorous or colored fumes before the 

 blowpipe, on charcoal. 



1. Wholly soluble in one or more of the 



three acids. 



* Infusible.* 



f Fusible with more or less difficulty. 



2. Soluble, except the silica which separates 



as a jelly 



* Infusible. 



j* Fusible with more or less difficulty. 



3. Not acted on by acids, or partially sol. 



uble without forming a jelly. 



* Infusible. 



f Fusible with more or less difficulty. 

 5. Colored or odorous fumes before the blow- 

 pipe, alone or on charcoal. 



B. Streak colored. 



a. No fumes before the blowpipe. 



* By infusible is meant, not capable of bi vng melted alone or on char- 

 oal by the flame of the common blowpipe. 



