320 



INDEX 



Wehrlite, 286 

 Wells, J. W., 269 

 Wheeler, H. A., 258 

 White lead, 124 

 Willemite, 257, 258 

 Williams, J. F., 224 

 Wirthle, F,. 186 

 Wohler, F,. 225 

 Wolff, J. E., 260 

 Wolframite, 110, 268 

 Wurtzite, 257 



Xanthosiderite, 190 

 Y 



Yamada, K., 173 

 Yeats, W. S., 136 

 Young, C. A., 24, 191 



Zinc, 256 



character of ore bodies, 259 



Zinc, extraction of, 265 



geographical distribution, 259 



geological horizon, 264 



metasomatic deposits, 40 



ores of, 257 



origin of ores, 257 



primary ores, 35 



production of, 304 



properties of, 256 



uses of, 266 

 Zincite, 257 

 Zircon, 275 



Zirconia, North Carolina, 276 

 Zirconium, 274 



character of ore bodies, 275 



extraction of, 275 



geographical distribution, 275 



geological horizon, 275 



ores of, 275 



origin of ores, 275 



production of, 307 



uses of, 276 

 Zorgite, 283 



