Vlll TABLE OF CONTENTS. 



IV. Hydrocarbon Compounds. 



PAGE 



1. Simple Hydrocarbons 321 



2. Oxygenated Hydrocarbons 325 



3. Asphaltuni and Mineral Coals 326 



Supplement to Descriptions of Species. 



1. Catalogue of American Localities of Minerals 333 



2. Brief Notice of Foreign Mining Regions 375 



IV. DETERMINATION OF MINERALS. 



General Remarks 379 



Table for the Determination of Minerals 384 



ON ROCKS. 



1. Constituents of Rocks 409 



2. Classes of Rocks 412 



3. On some Characteristics of Rocks 414 



Use of the Microscope in the Study of Rocks 422 



4. Kinds of Rocks 424 



1. Fragrnental Rocks, exclusive of Limestones 426 



2. Limestones or Calcareous Rocks 430 



3. Crystalline Rocks, exclusive of Limestones 434 



1. Siliceous Rocks 435 



2. Mica and Potash-Feldspar Series 437 



3. Mica and Soda-lime Feldspar Series 443 



4. Hornblende and Potash-Feldspar Series 444 



5. Hornblende and Soda-lime Feldspar Series 446 



6. Pyroxene and Soda-lime Feldspar Series 450 



7. Pyroxene, Garnet, Epidote, and Chrysolite Rocks, 



containing little or no Feldspar 452 



8. Hydrous Magnesian and Aluminous Rocks 453 



9. Iron-ore Rocks 455 



