116 PHYSIOGRAPHY. CLASS II. 



3. Among the best known localities are Schlackenwald 

 and Zinnwald in Bohemia, Zinnwald and Ehrenfrieders- 

 dorf in Saxony, and Pengelly croft mine in the parish of 

 Breage in Cornwall, where it occurs with tin-ores. In 

 Sweden it is found at Bispberg, in a bed of octahedral 

 Iron-ore, at Schellgaden in Salzburg, and Posing in Hun- 

 gary, in beds worked for gold, contained in gneiss and gra- 

 nite, at Neudorf in Anhalt-Bernburg, upon veins traver- 

 sing greywacke. It is likewise met with in Dauphiny and 

 America. Splendid specimens have been lately found at 

 Carrock in Cumberland. 



GENUS IV. HAL-BARYTE. 

 1. PEBITOMOUS* HAL-BARYTE. 



Di-prismatic Baryte or Strontianite. JAM. Syst. Vol. II. 

 p. 420. Pyramido-Prismatic Baryte or Strontianite. 

 Man. p. 69. Strontianite. Carbonate of Strontian. 

 PHILL. p. 186. Stronthian. WERN. Hoffm. H. B. 

 III. 1. S. 186. Strontianit. HAUSM. III. S. 979. 

 Kohlensaurer Strontian. LEONH. S. 604. Strontiane 

 carbonate'e. HAUY. Trait^, T. II. p. 327. Tabl. comp. 

 p. 15. Traite', 2de Ed. T. II. p. 43. 



Fundamental form. Scalene four-sided pyramid, 

 the horizontal section of which is = 117 19'. 

 Vol. I. Fig. 9. 



a : b : c = a : 1 : V 0-3709. 

 Simple forms. P OD (o) ; P 1 (z) f ; P (y) ; 



* From */ round, and vipva I cleave, cleavable with equal 

 facility in the direction of several faces, parallel to one axis. H. 



f The obtuse terminal edge of this form is given by Mr 

 PHILLIPS = 108 12 7 . He mentions besides two horizontal 

 prisms, parallel to the short diagonal of_ the prism P + os , 

 having their faces inclined to those of Pr + oo at angles of 

 126 5' and of 143 20'. H. 



