CONTENTS. xxi 



CLASS III. COMBUSTIBLE MINERALS, NOT GASEOUS. 



1. Sulphur, 181 5. Anthracite, 188 



2. Bitumen, 182 G.Coal, IQO 



3. Amber, 1 85 7. Lignite, 191 



4. Grapliite, 186 8. Peat, 192 



CLASS IV. ALKALINE MINERALS. 



ORDER I. AMMONIA. 

 Carbonate of Ammonia, 195 



ORDER If. SODA. 



1. Glauber's Salt, 19G 3. Common Salt, 198 



2. Natron, 197 4. Hydriodate of Soda 200 



ORDER III. POTASFI. 



1. Sulphate of Potash, 201 3. Muriate of Pota.sh, 202 



2. Carbonate of Potash, 201 4. Hydrobromate of Potash, ... . 202 



5. Alum, 202 



CLASS V. ALKALINE-EARTHY MINERALS. 



ORDER I. BARYTA. 

 Heavy Spar, 204 



ORDER II. STRONTIA. 



X 1. Celestine, 210 2. Strontianite, 212 



3. Bary.strontianite, 213 



ORDER III. LIME. 



1. Carbonate of Lime, 211 . 5. Apatite, 239 



2. Arragonite, 235 v 6. Fluor Spar, 243 



3. Gypsum, 237 7. Muriate of Lime, 245 



4. Anhydrite, 238 8. Divholiie, 24G 



9. Pharmacolite, 247 



ORDER IV. MAGNESIA. 



1. Brucite (Hydrate of Magnesia), 248 3. Epsom Salt, 251 



2. Carbonate of Magnesia, 249 4. Magnesian Carbonate of Lime, 252 



5. Hydrobromate of Magncsja, . . 2.jG 



