Vill CONTENTS. 
CHAPTER XXX. 
MINERAL RESOURCES OF THE UNITED STATES — 
(Continued). 
GOLD. 
Extent of the Gold Region of the United States.—Gold-Mines 
of Virginia— North Carolina— Georgia . . . Page 332 
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 XXXII. 
PRACTICAL APPLICATION OF GEOLOGY TO THE USEFUL PUR- 
POSES OP LIFE. 
Architecture.- Engineering — Roads —Canals — Embankments 
— -We^ls— Mining.—Agriculture 357 
