216 



PHYSIOGRAPHY* 



Sulphur. 



Fig. 429. 



Fig. 428. 



PonF 



P on P over n - 



s on s 



n on n 



m on m 



P on P over m - 



s on r 



106 38' 



84 58 



127 1 



124 24 



101 59 



143 26 



179 45 



Fig. 425. Primary having the obtuse angles of the base 

 truncated, (unitaire. HAUY.) Fig. 426. Primary having 

 the edges of the base replaced by tangent planes, (pris- 

 me. H.) Fig. 427. Primary having the acute, pyramidal 

 edges replaced by tangent planes, (emousse. H.) Fig. 

 428. Primary with summit, replaced by four planes rest- 

 ing upon the primary faces, (dioctaedre. H.) Fig. 429. 

 (equivalent. H.) 



Cleavage, parallel with P and m imperfect, obtained 

 with difficulty, and interrupted. Fracture conchoidal, 

 sometimes highly perfect. Surface n commonly rough, the 

 rest of the faces generally smooth and shining, possessing 

 nearly the same physical quality. 



