CONTENTS. XVII 



Page 



Volcanoes 225 



Rocks 247 



Paleontology 273 



Geognostic periods 289 



Physical geography 291 



Meteorology 317 



Atmospheric pressure 321 



Climatology 323 



The snow-line 337 



Hygrometry 341 



Atmospheric electricity 343 



Organic life 347 



Motion in plants 349 



Universality of animal life 351 



Geography of plants and animals 355 



Floras of different countries 359 



Man 361 



Races 363 



Language 367 



Conclusion of the subject 369 



