PHYSIOGRAPHY. CLASS II. 



Peggau in Stiria ; the curved lamellar one in several veins 

 near Freiberg in Saxony, in Derbyshire, in sandstone and 

 trap-rocks in Scotland. Large and beautiful crystals have 

 been found in the mines of Cumberland, Durham, and 

 Westmoreland in England, also at Felsobanya and Crem- 

 nitz in Hungary, at Freiberg, at Marienberg, and other 

 places in Saxony, at Przibram and Mies in Bohemia, 

 at Iloya and Roure in Auvergne, &c. Very pure masses 

 of considerable dimensions occur at Huttenberg in Ca- 

 rinthia, in iron-stone beds. Columnar Heavy-spar has 

 been found in the now abandoned mine of Lorenz Ge- 

 gentrum near Freiberg, and the varieties of prismatic 

 Heavy-spar in various localities in Saxony, at Przibram 

 and Mies in Bohemia^ in Auvergne, &c. ; fibrous varie- 

 ties are known from Mies, from Leiningen in the Pala- 

 tinate, from the vicinity of Liege and from America ; the 

 radiated variety chiefly from Monte Paterno near Bologna. 

 Crystals of the present species have been artificially ob- 

 tained by dissolving sulpho-cyanuret of barium in sulphuric- 

 acid, and allowing this solution to be slowly decomposed 

 by the influence of the atmosphere. The crystals are, ac- 

 cording to MITSCIIERLICH, similar to the first of the 

 above mentioned varieties, that is, to the rhomboidal prism 

 of 101 42' and 73 18'. 



5. Little use is made of the varieties of the present spe- 

 cies. Pure white varieties are ground and used as a white 

 paint, either alone or mixed with white lead, which cannot 

 be considered as an imposition. If associated with ores of 

 iron, it possesses bad influences upon the process of ex- 

 tracting this metal. 



4. PRISMAT01DAL HAL-BARYTE. 



Axifrangible Baryte or Celestine. JAM. Syst. Vol. II. 

 p. 423. Prismatoidal Baryte or Celestine. Man. p. 78. 

 Celestine Sulphate of Strontian. PHII.L. p. 187. Zo- 

 lestin. WE UN. Hcffm. H. B. III. 1. S. 190. Zolestin. 

 HAUSM.IH. S.082. Schwefelsaurer Strontian. LEONH. 

 S. 600. Strontiane sulfatee. HAUY. Traite', T. II. 

 p. 313. Tabl. comp. p. 14. Traite', 2de Ed. T. II. p. 30. 





