vili 



CONTENTS. 



CHAPTER XXX. 



MINERAL RESOURCES OF THE UNITED STATES 



(Continued). 



GOLD. 



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

 of Virginia—North Carolina— Georgia . . . Page 33S 



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 USEFIJL PUR 

 POSES OF LIFE. 



Architecture. — Engineering — Roads —Canals — Embankments 

 — Wells — Mining. — Agriculture . . , . . 357 



