CONTENTS, 



CHAPTER I. 

 Introduction ..... Page 7 



CHAPTER II. 



Fungi attacking the straw of wheat . . 32 



CHAPTER III. 

 Fungi attacking the leaves, chaft'-scales, and flower . 54 



CHAPTER IV. 



Fungus destroying the grain . . .69 



CHAPTER V. 



Infusorial insect destroying the grain, called Vibrio Tritici, or 

 Eel of the Wheat . . • .83 



CHAPTER VI. 

 Ergot ..;.... 95 



CHAPTER VII. 



AVheat midge— Hessian fly . • • * 108 



