TABLE OF CONTENTS. 



XX111 



Dolcoath mine . . . page 300 



Gold 300 



Iron and Gold 301 



The Wicklow mines .... 301 



Crystallization 301 



Rock salt 301 



Salt springs 302 



Inorganic matter . . . page 302 



Heat of mines 302 



Diamonds 303 



Alumina 303 



Artificial diamonds and other 



gems 304 



The pearl 304 



GEOLOGY. 



Rocks 305 



Primary rocks 306 



Secondary rocks 307 



Primitive rocks 308 



Transition rocks 308 



Floetz rocks \ 308 



Extinct beings 308 



The chemical and mecha- 

 nical deposits of Werner 310 

 The constituents of primi- 

 tive rocks 310 



Characters of rocks .... 310 



Granite 311 



Basalt and lava 312 



Whinstone and lava ... 312 



Strata 313 



Aqueous origin 313 



Wernerian or Neptunian 



theory 313 



The Plutonic, Huttonian, 



or Igneous theory ... 314 

 Geological systems .... 314 

 The different effects of com- 

 bustion and ignition . . 315 



Igneous origin 315 



Theory of successive crea- 

 tions 315 



Series of living forms . . . 317 



The deluge 317 



Revolutions in the animal 

 kingdom 317 



Agreement of fossils with 



their strata 318 



omparative antiquity of 



fossils 319 



Human fossils 319 



Fossil elephants , 320 



Antediluvian bears .... 320 



Fossil fish 320 



Surface of the earth before 



the deluge 321 



The antediluvian flora and 



climate . . , 321 



Sand, clay, and limestone 321 



Coal 322 



Chalk 322 



London gravel 322 



Sandstone and limestone 



hills 323 



Volcanoes 323 



The island of Owybee . . 324 

 Subterranean communication 



of volcanoes 324 



Mud volcanoes 324 



Extinct volcanoes . . . . . 325 



Earthquakes 325 



Source of volcanic fire . . 325 

 Temperature of the earth 



at various depths .... 326 

 Hotsprings and central heat 326 

 Results of geology .... 327 



