ESSAY 



ON THE 



INSECTS AND DISEASES 



INJURIOUS TO THE 



WHEAT CROPS. 



BY H. Y. HIND, ESQ., M.A., 



$roffssor of Cfjnrnstra at STttntta College, Toronto. 



TO WHICH WAS AWARDED, BY THE BUREAU OF AGRICULTURE 

 AND STATISTICS, 



THE EIEST PRIZE. 



"The progress of agriculture ought to be one of the objects of your constant 

 care ; for upon its improvement or decline depends the prosperity or decline of 

 empires." Speech of NAPOLEON III. 



TORONTO: 



PRINTED BY LOVELL & GIBSON, YONGE STREET. 

 1857. 



