OltOEll XII. GENERA AND SPECIES. 451 



H. = 2-0 ... 2-5. 

 G. = 5-5 ... 5-8. 



Jamesonite. iii. 26. 



VIII. MELANE-GLANCE. Prismatic. 

 Colour iron-black. 

 H. = 2-0 ... 2-5. 

 G. = 5-9 ... OH. 



1. PRISMATIC. Prismatic. Pr = 115 39'. 



Cleavage, (Pr + os) 3 = 72 13'. Pr + oo. Indistinct. 

 Prismatic Melane-Glance. J. iii. 27 



Argentiferous Copper-Glance. J. iii. 73. 



Bismuthic Silver $ J. iii. 78. 



Cdbaltic Galena. J. iii. 88. 



Cupreous Bismuth* 3, iii. 91. 



Eucairite. iii. 94. 



Flexible Sulphurct of Silver. PHILL. iiL 30. 



MolyMena-Silver. J. iii. 127. 



Native Nickel. J, iiL 129. 



Needle-Ore. J. iii. 130. 



Seleniuret of Copper. PHILL. iii. 150. 

 Sulphuret of Silver and Antimony. PHILL. iii. 30. 



Tennantite. iii. 161. 



Tin-Pyrites. J. iii. 163. 



Yellow Tellurium? J. iii. 171. 



XII. ORDEB. BLENDE. 



I. GLANCE-BLENDE. Tessular. 

 Streak green. 

 H. = 3-5 ... 4-0. 

 G. =3-9 ... 4-05. 



