660 The American Naturalist. uly, 

The mineral is steel-gray, with a grayish-black streak. Sanguinite?® 
is associated with argentite and proustite at Chafiarcillo, Mexico, as 
bronze-red scales, containing sulphur, arsenic, and silver. By reflected 
light the scales are black; by transmitted light they are red. The 
streak is dark purplish-red, Crystallization probably hexagonal. The 
material available was too scanty to allow of analysis. Kalhcite, 
from Grube Friedrich, near SchGristein, on the river Sieg, in Prussia, 
is a nickel sulph-antimonide of composition, according to Laspeyres,’ as 
follows : 

Sl As Bi Fe Co Nic 
14.391 44.942 2.016 11.758 276 .889 26.943 
equivalent to NiAsS+ 2NiBiS+1 3NiS6S. Its specific gravity is 7.011, 
and its position in the systematic classification of minerals is with 
ullmannite.——Sychnodymite is described by the same writer as a new . 
cobalt-copper-sulphide from the Kohlenbach Mine, near Siegen, 
Prussia, corresponding to polydimite among the nickel compounds. 
The mineral occurs in little twinned octahedra of a darker color than 
those of polydimite. It is associated with quartz, tetrahedrite, and 
pyrite. Its density is 4.758, and composition : 


S Cu Fe Co Ni ; 
joba, 18.084 927 3706 pit OCN, 
Mineralogical News.—Honey-yellow or greenish-yellow crystals 
of axinite from Franklin, N. J., have an unusual tabular habit, with 
the P! face largely developed. They also contain several rare planes, 
well te ie and a new face, $P!,. Their axial peuo is a:b: c= 
4921 : 1:.4797, and a= 82° 5# 13”, B==91° 51’ 43”, y = 131° qi 
19”. Their specific gravity is 3.358, and composition :° 
SiO, * 0, ALO, FeO, CuO QuO MnO MgO CaO Ign 
-76 2.77 5-10 16.73 TF R48 13.609 23 18.25 -. :76: 
Lamellar masses of the same mineral have a density of 3.306. Their 
composition does not vary much from that of the crystals. Crystals of 
the same mineral from Guadalcazar, Mexico, are associated with white 
feldspar. These are sage-colored. They are tabular parallel to 'P, 
and their faces are frequently rounded. Granular scaly masses identi- | 
cal in character with the crystals yielded: 
SiO, B,O, ALO, FeO, CuO MnO MgO CaO Ign 
42.85 5.17 16.96 5.00.19 9-59 -87 18.49 .75 
1 Miers. Mineralogical PoE IS, p.t. 
8 Zeits. f. Kryst., X1X., 1891, p. 1 
9 Genth, Penfield and Pirsson. ous Jour. Sci., May, 1891, P. 394. 


