vili 



CONTENTS. 



CHAPTER XXX. 



MINERAL RESOURCES OF THE UNITED STATES 



(Continued). 



GOLD. 



Extent of the Gold Region of the United States.— Gold-Minei 

 of Virginia— North Carolina— Georgia . . . Page 333 



CHAPTER XXXI. 



MINERAL RESOURCES OF THE UNITED STATES 



(Continued). 



Lead. — Copper.— Silver.— Manganese. — Peat.— Marl.— Granite 

 — Lime.— Gypsum. — Marble. — Salt.— Petroleum. — Carburet 

 ted Hydrogen 339 



CHAPTER XXXil. 



PRACTICAL APPLICATION OF GEOLOGY TO THE USEFUL PUR 



POSES OF LIFE. 



Architecture. — Engineering — Roads —Canals — Embankments 

 —Wells— Mining.— Agriculture 357 



