18 



OrgcDiic Acids in the Examination of Minerals. 



III. 



Minerals not decomposed by the above Reagents. 



Graphite, 



lolite. 



Talc, 



Labradorite, 



Molybdenite, 



Biotite, 



Kaolin, 



Oligoclase, 



Proustite, 



Muscovite, 



Ripidolite, 



Albite, 



Fluorite, 



Lepidolite, 



Columbite, 



Ortlioclase, 



Cryolite, 



Wernerite, 



Samarskite, 



Tourmaline, 



Corundum, 



Leucite, 



Spinel, 



Sclieelite, 



Diopside, 



Andalusite, 



Cliromite, 



Barite, 



Petalite, 



Fibrolite, 



Clirjrsoberyl, 



Celestite, 



Asbestus, 



Kyanite, 



Cassiterite, 



Anhydrite. 



Beryl, 



Topaz, 



Rutile, 



(Two hundred 



Zircon, 



Titanite, 



Quartz, 



species.) 



Vesuvianite, 



Staurolite, 



Hyalite, 





Zoisite, 



Boweuite, 



Anorthite, 





N. B. — The gases evolved are examined with acetate of lead test-paper 

 the solutions with appropriate reagents. 



The kind and degree of action are uidicated in the above Tables by the 

 following signs : — 



! Completely decomposed or dissolved. 



* Feebly attacked. 



t The COo evolved is derived from the Citric Acid. 



t Gelatinizes. 



