184 



PHYSIOGRAPHY. 



lake mine in Cornwall, also from several mines in the 

 neighbourhood of St Austle and Eedruth, as Tincroft, 

 Wheal Buller, &c. In the Saxon mining districts of Jo- 

 hanngeorgenstadt, Schneeberg, and Eubenstock, it is found 

 in silver and iron veins ; in the same manner in the bor- 

 dering districts of Bohemia. It occurs in veins in granite 

 at St Symphorien near Autun, and at -St Yrieix near 

 Limoges in France. It is likewise met with at Boden- 

 mais in Bavaria, and near Baltimore in North America. 



GENUS II. COBALT-MICA. 

 1. PRISMATIC COBALT-MICA. 



Prismatic lied Cobalt. JAM. Sjst. Vol. II. p. 192. 

 Man. p. 109. lied Cobalt. Cobalt Bloom. Arseniate 

 of Cobalt. PHILL. p. 281. Rother Erdkobold. WEIIN. 

 Hoffm. H. B. IV. 1. S. 201. Kobaltbliithe. HAUSM. 

 III. S. 1124. Arseniksaures Kobalt. LEOXH. S. 304. 

 Cobalt arseniate'. HAUY. Traite', T. IV. p. 216. Tabl. 

 comp. p. 107. Traite', 2de Ed. T. IV. p. 232. 



Fundamental form. Scalene four-sided pyramid. 



f 



{ , . , 134 H', 82 50'. Inclination 



of the axis = 9 47', in the plane of the long 

 diagonal. Vol. I. Fig. 41. A P. 



a : b : e : d = 5-8 : 11-4 : 8-1 : 1. 



Simple forms. ^ (/) = 1 }S 28' ; (P + oo) 3 (&) 

 = 130 10' ; (Pr + x) 5 (*) = 94 12' ; ^ (M) 



4 ^ r O tt r _j_ Q 



= 55 9'; l--^p-(o)=S9 5%; fZ-l. 

 , : (?) =27 gy ; Pr + QD (T) ; Pr + x (P). 



