CONTENTS. IX 



tage. 

 Manganese : 



Manganese ore 170 



Nickel and cobalt: 



Nickel mineral 17l 



Milleiite 171 



Nickel and cobalt mineral 171 



Liiiureite 171 



Nickel and cobalt ores 172 



Application of nickel and cobalt 172 



Zinc : 



Zinc minerals 173 



Zincite 173 



Frauklinite. .., 174 



Sphalerite or blende 174 



Willemite 175 



Calamine 175 



iSmitbsonite 176 



Zinc ores 176 



Preparation of blende 177 



Galena Mill 177 



Extraction of zinc ''. 179 



Glendale Zinc Works 180 



Joplin Zinc Works 1'32 



Rich Hill Zinc Works 183 



Passaic Zinc Works ■- Ie4 



Tin: 



Tiu mineral 187 



Cassiterite 187 



Tin ores 187 



Antimony : 



Antimony mineral and ore 189 



Stibnite 189 



Mercury : 



Mercury minerals 190 



Mercury 190 



Cinnabar 190 



Mercury ores 190 



New Almaden mine and works 191 



Aluminium : 



Aluminium minerals 193 



Corundum 193 



Bauxite 193 



Cryolite 194 



Clay 194 



Extraction of aluminium 194 



Chromium : 



Chromium mineral and ore 195 



Chromite 195 



Pismuth ores 196 



Alloys 196 



Precious metal , 196 



Brass 196 



Babbitts, solders, etc 198 



Type metal '199 



Tiu plate 200 



