YI 
CONTENTS 
Page. 
Chapted IV.—General mineralogy of the district—Continued. 
Notes on occurrence—Continued. 
Oxides, carbonates, sulphates, silicates, etc. 122 
Fluorite. 122 
Quartz.•--- 123 
Chalcedony. 123 
Opal..'. 123 
Magnetite. 123 
Specularite.... 123 
Zircon. 123 
Rutile. 123 
Limonite...— 123 
Psilomelane and wad. 123 
Molybdite and ilsemannite. 123 
Calcite. 124 
Dolomite. 124 
Rhodochrosite.....c. 124 
Barite. 124 
Celestite. 124 
Alunite. 125 
Gypsum. 125 
Glockerite.-*. 125 
Basic hydrous strontium sulphate. 125 
Chalcanthite...... 126 
Mirabilite. 126 
Mallardite. 126 
Epsom ite. 126 
Other sulphates. 126 
Apatite. 126 
Wa veil ite. 126 
Hiibnerite. 127 
Titanite. 127 
Orthoclase. 127 
Microcline. 127 
Albite. 127 
Oligoclase, labradorite, and anorthite. 127 
Nepheline. 127 
Sodalite and nosean. 127 
Analcite. 127 
Stilbite and natrolite.*. 127 
Tourmaline. 127 
Olivine. 127 
Amphibole. 128 
Pyroxene. 128 
Muscovite. 128 
Biotite. 128 
Roscoelite. 128 
Chlorite. 128 
Serpentine. 128 
Kaolin. 128 
Cbrysocolla. 129 
Morencite(?), chloropal(?). 129 
Hydrocarbons. 129 
Coal. 129 
