VI CONTEXTS. 



CHAPTER II. 



CHEMISTBY OF THE LAND. 



Apparent unchangeableness of the Aspects of Nature Not 

 real Secret Chemical Forces Destruction slow, silent, but 

 Bure Agencies Water Carbonic Acid Oxygen Nia- 

 gara Falls Recession of Salt-field of North wich Crystal 

 Island Powerful Effect of Carbonated Water Professor 

 Rogers' Experiments Effect of Oxygen Disease of the 

 Granite The Kettle and Pans Porcelain Clay Forma- 

 tion of, out of Granite Silver Mines California!! Gold 

 Persistence of Egyptian Monuments Its Cause Debris 

 Production of Mont Blanc Alps Rhine Valleys of the 

 Cordilleras Alluvium Composition and History of 

 Rocks and Hills crumbling to Dust p. 65 



CHAPTER III. 



CHEM1STHY OF THE SOIL. 



Composition of the Vegetable Soil Mother-earth Mould 

 Chemical History of a Valley A Delta Clothing witli 

 Plants Deatli of a Tree Dispersion of its Elements 

 Chemistry of its Death The Farm-yard The Dung-heap 



Ilniivis Use' of Vegetable Soil Carbon Formation of 

 Coal Mackenzie River Chemistry of Coal Peculiar 

 Character of its Decay Arrangement of Coal-beds The 

 Diamond Chemical Origin of Amber p. 112 







CHAPTER IV. 



CHEMISTEY OF THE IKTEKIOH. 



Disquiet within our Planet Deep Chemistries of the Earth 

 High Temperature of Interior Proofs of Artesian Wells 

 Source of Telrestial Heat The Sun Chemical Decom- 

 position in Crust Central Heat Experiments of Mr. 

 Grove and Dr. Robinson Curious Property of Intense 

 Heat The Earthquake Phenomena of Causes of 

 Electrical Origin of Protection against -Earthquakes in 

 Britain The Volcano Chemistry of Jorullo The 

 Moffettes Upas-tree and Valley Choke-damp Lake of 

 the Solfatara Chemistry of Caves Fire-damp Niagara 



Salt-mine Singular Evolution of Gas -^Safety-lamp 

 " Blowers " in Coal-mines Mud Volcano* Air Volcuuos- 



