VIII CONTENTS. 



PAQl 



Table of the composition of soil naturally fertile, arti- 

 ficially fertilized, and barren, 45 



Table of inorganic substances in wheat, oats, barley, and 

 rye, 47 



Tables of symbols of the principal compound bodies named 

 in this work, (A. 36) .. 102 



Tribe of hunters cannot multiply beyond a fixed and 

 early attained point, . (A. 39) . .104 



Use of ammonia to plants, G2 



Use of the carbonic acid gas thrown into the atmosphere 

 by respiration, 79 



Woollen rags as a manure, 58 



Warmth and ventilation important to stock, and a source 

 of economy to the farmer,. 85 



