CONTENTS. IX 



Esquimaux and Hindoo Cold and Appetite Sources of 

 Animal Heat The Breath of Life Breathing in Insects 

 Changes in the Animal Frame Chemistry of Starvation 

 Death p. 333 



CHAPTER VII. 



THE ATMOSPHERE AND VEGETATION. 



Germination Nutrition of Plants The Orchids Soil not 

 the chief Source of Carbon Proofs Experiment on a Vine 

 Branch Carbonic Acid in the Air Forests of New World 

 Effect of Vegetation on Air Sunlight and Plants Ac- 

 tinism Light Heat Relation of to Plants Purification 

 of the Air Trade Winds The Air and the Soil General 

 Constitution and Laws of the Atmosphere ... p. 353 



PART III.-TBE OCEAN. 



CHAPTER I. 



IT8 PHYSICAL CONSTITUTION. 



Depth Deep Soundings Pressure of the Waters Elasticity 

 of Water Light in the Ocean Colour Blue and Green 

 Grottos Phosphorescent Seas Luminosity of Marine 

 Beings Temperature of the Ocean Zones of Animal Life 

 Stratum of uniform Temperature Remarkable Law 01 

 Water Ground Ice Climate of the Channel Islands p. 383 



CHAPTER II. 



CHEMISTRY OF THE OCEAN. 



Analysis of Sea-water Saline Contents Prof. Forchham- 

 mer's Results Fresh- water overlying Salt Constancy of 

 Composition Origin of Saline Matter -Explanation 

 Special Arrangement The End in View Organic Matter 

 in Sea-water Chemistry of Phosphorescence Discoveries 

 of Ehrenberg Ozone and Phosphorescence Fluorine in 

 Sea-water Self-purifying Property of the Ocean . p. 407 



