52 PHYSIOGRAPHY. CLASS ir. 



phur, and 70-04 of arsenic. It gives the same re-actions as 

 the preceding species. 



2. Some of the varieties of hemi-prismatic Sulphur oc- 

 cur along with the prismatoidal one, in beds of clay, as at 

 Tajowa in Hungary. It is found in small nodules, along 

 with tetrahedral. Copper-glance and hexahedral Iron-py- 

 rites, engaged in dolomite, a granular variety of macroty- 

 pous Lime-haloide, at St Gothard in Switzerland. More 

 generally it is met with in metalliferous veins, particularly 

 with ores of silver and lead, with native Arsenic, several 

 species of Pyrites, of Bary te, and Haloide, &c. The chief 

 localities are Kapnik and Nagyag in Transylvania, Felso- 

 banya in Upper Hungary, Joachimsthal in Bohemia, 

 Schneeberg in Saxony, Andreasberg in the Hartz, and 

 many other places. Hemi-prismatic Sulphur is found in 

 Peru, in the United States of North America, and along 

 with the preceding species in the- vicinity of several active 

 volcanoes. 



4. The hemi-prismatic Sulphur, like the preceding spe- 

 cies, is used as a pigment. 



3. PRISMATIC SULPHUR. 



Prismatic Sulphur. JAM. Syst. Vol. III. p. 459. Man. 

 p. 295. Sulphur. PHILL. p. SCO. Naturlicher 

 Schwefel. WERN. Hoffm. H. B. III. 1. S. 252. Schwe- 

 fel.HAUSM.I.S.61. Schwefel. I>EONH.S. 109. Soufre. 

 HAUY. Trait^, T. III. p. 277. Tabl. comp. p. 68. 

 Traite', 2de Ed. T. IV. p. 407- 

 MITSCHERLICH. Ann. de Chimie. Vol. XXIV. p. 264. 



Fundamental form. Scalene four-sided pyramid, 

 P = 106 38', 84 58', 143 1?'. Vol. I. Fig. 7. 

 MITSCHERLICH. 



a : b : c = 1 : V' 2 77 6 : ^0-1 824. 



Simple forms. P oo (r) ; P % = 142 4', 

 133 3', 62 9' ; | P 2 (*) = 127 1', 113 11', 

 90 15'; P (P), Conil, Spain; P + oo (m) = 



