ORDER IV. UXCLEAVABLE STAPHYLINE-MAL. 159 



OBSERVATIONS. 



1. Copper-Green and Ironshot Copper-Green^ into which the 

 varieties of the present species used formerly to be distin- 

 guished, differ in nothing but the greater or less pureness 

 of their substance. The latter of these, comprehending 

 the dark-coloured and brown varieties, was again sub- 

 divided into tlaggy and earthy ironshot copper-green, the 

 one firm, and presenting a conchoidal fracture, the other 

 earthy, and of a friable consistency. Some mineralogists 

 unite the earthy varieties with the hemi-prismatic Habro- 

 neme-malachite, from which some of them may possibly 

 derive their existence, and formerly all the varieties of it 

 were comprehended by some within that species. 



2. Two analyses, one by KLAPROTH, another by JOHN, 

 have yielded 



Copper 40-00 42-00. 



Oxygen 10-00 7-63. 



Silica 26-00 28-37- 



Water 17'00 17'50. 



Carbonic Acid 7-00 3-00. 



Sulphate of Lime 0-00 1-50. 



Before the blowpipe upon charcoal it first becomes black, 

 in the inner flame red, without melting. Vv'ith borax it 

 melts into a green glassy globule, and is partly reduced, as 

 the metallic particles shew, which this globule contains. 

 If pure it is soluble without effervescence in nitric acid, 

 and leaves a residue of silica. 



3. The natural repositories of the present species are 

 those of other ores of copper, where it is found along with 

 them ; and also with ochry varieties of prismatic Iron-ore, 

 prismatic Hal-baryte, rhombohedral Quartz, &c. 



4. It occurs at Saalfeld in Thuringia, at Lauterberg in 

 the Hartz, at Saska and Moldawa in the Bannat, at Her- 

 rengrund in Lower Hungary, at Falkenstein and Schwa t^ 

 in the Tyrol, in the Lizard district in Cornwall, in Nor- 

 way, Siberia, Mexico, and ChilL 



