Ys/a? 



CONTENTS. 



Section first. 



CHAPTER I. 



PAGK 



Introduction 11 



CHAPTER II. 



The Atmosphere and its Carbon 14 



CHAPTER III. 



Hydrogen and Oxygen 21 



Nitrogen 22 



Ammonia 23 



CHAPTER IV. 



Earthy Matter 27 



Alkalies 28 



Potash 28 



Soda 29 



Lime 29 



Magnesia 30 



Acids Phosphoric Acid 30 



Sulphuric Acid 31 



Silicic Acid, or Silica 32 



Neutrals Chlorine 33 



Oxide of Iron. 33 



CHAPTER V. 

 Growth 34 



CHAPTER VI. 



Starch, Woody-Fibre, Gluten, etc 39 



Animals 42 



CHAPTER VII. 



Location of the Different Parts, and Variations in the Ashes- 

 of Plants 46 



CHAPTER VIII. 

 Recapitulation 49 



