THE SOIL AND CLIMATE. 13 



perhaps, that exist. These causes are manifold and 

 deeply, seated ; and I propose to inquire into them; but 

 first I must prove what I have advanced. For this pur- 

 pose, I am obliged to enter into some details which are 

 purely agricultural. I proceed, then, to show, in the first 

 place, how it is that English agriculture is richer than ours, 

 and shall then inquire why it is so. 



