SO PHYSIOGRAPHY. CL 



*L Flexible Sa!ph*ret of Sihcr. 



Flexible Sulphuret of Silrer. PHILL. p. 289. Argc 

 sulfiire flexible, BOURJCOX. Cat. p. 



Hemi-prismatic. A crystal is given by Mr PHILLIPS, ob- 

 served and measured by Mr BROOKE. It nearly resembles 

 Fig. 172^ but is flattened between P and P, having the 

 edges between M and T replaced bj one plane e, and those 

 between / and P by two planes, d* and d l . Angles, M 

 on T = 125, e on T = 159 3 , / on / = 121% d* on d* 

 = 83*30', <P on <* = 48, k on A- = 126 40 7 , *on* = 90'. 



Cleavage perfect, parallel to P. 



Lustre metallic. Colour dark externally, nearly black. 

 Streak shining, but less so than hexahedral Silver-glance. 



Thin laminae flexible. Yields readily to the knife. 

 It consists, according to the experiments of Dr WOLLAS- 



TOM, of silver, sulphur, and a little iron. This mineral 



was first discovered by Count Bouaxox, who suspects 



Hungary to be the locality of the specimens he examined. 



ii. Sulphuret of Stiver and Antinomy. 



Sulphuret of Silver and Antimony. PHILL. p. 290. Mine 

 d'argent grise antimoniale. HOME DE L'!SLE. Vol. 

 IIL p. 54. 



Prismatic. Combinations similar to Fig. 23., without A, 

 and having several other prisms (g- 1 , g-*, g 3 ) contiguous 

 to its obtuse edge, which in the figure is that between 

 two adjacent faces of M. Inclination, according to 

 PHILLIPS, of x on x = 130' S 7 , P on P = 60 B&, * on 

 * = 57 4^, M on M (adjacent) = 100, g* on g l = 1 19 

 4CK, g* on g* = 139, g* on g* = 1&J\ 



Cleavage, easy parallel to M and in other directions. Sur- 

 face striated in a longitudinal direction. 



Lustre metallic. Colour approaching to silver white. 



Yields easily to the knife. Sp. Gr. = 5-5. 

 Before the blowpipe it gives out copious white vapours 



and a slight sulphureous odour, leaving behind a white me- 



taUic globule. It is supposed to consist chiefly of antimony. 



