INDEX. 



T. 



Yenite, 245. 



Yttria, Phosphate of, 208. 

 Yttrium ores, 206, 208. 

 Yttro-cerite, 206. 

 Yttro-tantalite, 208. 

 Yttro-ilmenite, 229. 

 Yttro-titanite, 212. 



Z. 



Zaffre, 268. 

 Zeagonite, 168. 

 Zeolites, 163. 



Iron, 246. 

 Zeuxite, 172. 

 ZINC, 269. 



Zinc, alloys of, 275, 27». 



Carbonate of, 272. 



Red oxyd of, 270. 



Silicate of, 272. 



Sulphate of, 271. 



Sulphuret of, 269. 

 Zinc blende, 269. 

 Zinc bloom, 272. 

 Zinc ores, general remark* on, 278. 



Reduction of, 274. 

 Zincite, 270. 

 Zinkenite, 223- 

 ZIRCONIA, 200. 

 Zircon, 200. 

 Zirconite, 201. 

 Zoisite, 183. 

 Zygadite, 182. 



Erratum. — On page 156, loth line from the bottom, w»d " til 

 mina, 29 'S," instead of " alumina, 2'3." 



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