3 PHYSIOGRAPHY. CJ.AS3 II. 



Protoxide of Manganese 82*00 85-00. 



Sulphur 11-00 15-00. 



Carbonic Acid 5-00 0-00. 



It is generally, however, considered as a sulphuret of man- 

 ganese. Before the blowpipe it is melted with difficulty, 

 and only on its thinnest edges. It emits sulphuretted hy- 

 drogen, if reduced to powder and thrown into nitric, muria- 

 tic, or dilute sulphuric acid, and is dissolved. 



2. It is a rare mineral. It occurs chiefly in veins along 

 with prismatic Tellurium-glance, at Nagyag in Transyl- 

 vania. According to PHILLIPS, it is found also in Corn- 

 wall. 



GENUS II. GARNET-BLENDE. 



1. DODECAHEDRAL GARNET-BLENDE. 



Dodecahedral Zinc-Blende. JAM. Syst. Vol. III. p. 410. 

 Man. p. 288. Blende. Sulphuret of Zinc. PH i L L. p. 35 1 . 

 Blende. WEIIN. Hoffm. H. B. IV. 1. S. 73. Blende. 

 HAUSM. 1. S. 229. Blende. LEONH. S. 309. Zinc 

 sulfure. HAUY. Traite', T. IV. p. 167- Tabl. comp. 

 p. 103. Traite', 2de Ed. T. IV. p. 186. 



Fundamental form. Hexahedron. Vol. I. Fig. 1. 



Simple forms. H(*) Cornwall; (g) Vol. I. Fig. 13.; 



(0 Vol. I. Fig. 14.; D (P) Vol. I. Fig. 31.; 



| Vol. I. Fig. 17.; - ~ (</) Vol. L Fig. 16. 

 Char, of Comb. Semi-tessular, with inclined faces* 



Combinations. 1. 2- ~- Fig. 158. Cornwall. 

 2. 2. _ ^. Vol. I. Fig. 78, the faces r con- 



siderably enlarged, so as to intersect each other. 

 Junge hohe Birke mine near Freiberg, 



