302 



INDEX. 



Wright, C. E., origin of Lake Supe- 

 rior ores, 106. 

 "Wyoming copper mines, 152. 



Geology of, 216. 



Iron mines, 126. 



Iron ore near Fort Laramie, 114. 



Spathic iron ore, 89. 



Specular ore near Fort Laramie, 

 114. 



Tin ores, 274. 



Titaniferous ores, 281. 

 Wythe Company zinc mines, 282. 

 Whyte Co., Va., zinc and lead mines, 



172. 

 Xenogenites of Posepny, 283. 



Yakima Co., Wash., gold, 238. 

 Yakutat Bay, Alaska, 240. 

 Yarmouth, N. S., 255. 

 Yavapai Co., Ariz., 228. 

 York Co., N. B., antimony, 259. 

 York Co., Penn., iron mines, 127. 

 Yuma Co., Ariz., 228, 229. 

 Yuba River, California, 282. 

 Yukon River, Alaska, 253. 

 Zinc minerals, 174. 



Statistics, 180. 



Zirkel, F., on the rocks of the Corn- 

 stock Lode, 236. 

 Zone of oxidized ores in a vein, 38. 



Of sulphides, 38. 



