Vill TABLE OF CONTENTS. 
IV. HypDrRocaARBoN ComPpounpDs. 
PAGE 
1: Simple Hydrocarbons... 22-8 Ji: 2. ..ce se 821 
2. Oxygenated Hydrocarbons.) os... 2. ee 320 
o. Asphaltum and Mineral Coals: , 2.222650) 2 25.525 Sse 326 
SUPPLEMENT TO DESCRIPTIONS OF SPECIES. 
1. Catalogue of American Localities of Minerals............. isis) 
2: brief Notice of Foreion-Miming: Resions. -. 2... ... oe By) 
IV. DETERMINATION OF MINERALS. 
General Remarks joi. 06.6.5 cts yore. Sitesi ocean By 
Table tor the Determination of Minerals. | 2..2-6 oes See 584 
ON ROCKS 
I SConstituents of Rockse/0ac sc. Se eee ee ee ee 409 
2..’ Classes .of Rocks. 22 cn sh i Gale ee oh es Oe ee en er 412 
3. On some Characteristics of Rocks.......... wie en acca Cee 414 
Use of the Microscope in the Study of Rocks.............. 422 
4" Kinds of “Rocks. 0. .n0a ee een secs oe a 424 
e Fragmental Rocks, exclusive of Limestones............ 426 
: ‘Limestones or Calcareous Rocks... >. 2-2 oe 430 
3. Crystalline Rocks, exclusive of Denese. TS ee 434 
1. Siliceous Rocks..2 220250. 23.30 eee eee 435 
2. Mica and Potash-Feldspar Series................ ‘ABT 
3. Mica and Soda-lime Feldspar Series............ “448 
4. Hornblende and Potash-Feldspar Series.......... 444. 
5. Hornblende and Soda-lime Feldspar Series....... AAG 
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...... 458 
D: ‘Tron-orevROcks |..." nee Ge at hie 455 
