AND DEDICATION. Vll 



Repeated observation and demonstrative 

 experiments have convinced me, that al- 

 though Sir Humphry Davy's analysis, and 

 expositions of chemical principles, are cor- 

 rect and clear, in his application of them 

 to agricultural practice, and in his infer- 

 ences, he is greatly mistaken. 



That although Sir John Sinclair, is copi- 

 ous and minute in his description of agri- 

 cultural operations and practical results, his 

 opinions and deductions are erroneous and 

 inconclusive. 



That Sir Joseph Bankes, in his opinion 

 and description of the rust or black blight 

 in wheat, has mistaken the effect for the 

 cause, and thus misled the public in their 

 endeavours to find a remedy. 



That Mr. Knight's opinions and exposi- 

 tions, as quoted by Sir John Sinclair and 

 Sir Humphry Davy, are hypothetical and 

 fallacious. 



That Bakewell's principles and practice 

 in breeding, condemned by Sir John Sin- 

 clair, and neglected by the generality of 

 agriculturists, are founded on true scientific 



