INDEX. 
261 
Page. 
White Cloud mine, andesitic breccia from, 
analysis of 126 
andesitic breccia from, mineral com- 
position of - 126 
description of _. 236 
rock near, character of.. 125-126 
Yankee Girl mine, cosalite from, analysis 
of 220 
description of 221 
monzonitic porphyry from near, anal- 
ysis of 127 
Page. 
Yankee Girl mine, stock ore in, value of. . 112 
Yankee Girl ore body, discovery of 22 
Yellow copper. See Chalcopyrite. 
Yellow Rose mine, description of... :!9i 
Zinc blende. See Sphalerite. 
Zinkenite, occurrence and character of.. 81 
Zuni mine, kaolinite in . . 73 
description of ....... :i49-250 
Zunyite, analysis oi 76 
occurrence and character of 75-77 

