KAHANISTJQtriA SILVJIR-BEARING BELT. 249 



be detached are six or seven inches long, twisted, and usually 

 tai-nished. 



D. In fine hair or moss-like masses associated it may be with a 

 little wire silver in a vug in the quartz. 



E. Associated with ii'on pyrites in vug in calcite — Beaver Mine. 



Note. — One specimen of native silver taken 75 feet undex'ground, 

 Badger Mine, the silver seems to be in thin sheets along the cleavage 

 planes of calcite. This is an interesting specimen and a section of 

 which under microscope would fully explain. The silver seems 

 almost in the character of a pseiido-morph after the calcite. 



Note 2. — Occasionally in leaf in the neighboring slate or in the 

 quartz of the vein. 



The Argentite, Silver Glance, Black Sulphide of Silver occurs under 

 four conditions : 



1. As leaf in the seams of the quartz, or coating calcite crystals, 

 and also in the slate contiguous to the vein. Frequently a thin seam 

 or leaf coats the slate next to the vein matter, and from this appar- 

 ently little stringers are observed running in to the vein between the 

 quartz crystals, filling small cavities and forming nuggets. 



2. As strings closely mixed with the quartz gangue giving it all a 

 uniformly dark color. 



3. As nuggets, or massive, from an ounce or less in weight to six 

 or seven pounds, chiefly found in coarse-gi'ained drusy calcite, also in 

 vugs in the quartz. 



4. In feather-like forms, as is seen in native silvei-, filling the 

 gangue entirely so that it is scarcely discernible. 



Note (a). A great deal of the darker zinc-blende has argentite in- 

 timately associated with it. Thin folia-like pieces of sulphide lying 

 between the cleavage planes of the blende or coating it on the 

 surface. 



