C 32 ) 



is still capable of bearing those of another 

 genus, we should examine the nature of the 

 particles consumed by different vegetables , 

 in order to repair the waste by analogous 

 supplies. 1 



The most glaring imperfection in the agri- 

 culture of those parts of France which I have 

 visited , is the deficiency of manure. The 

 number of cattle on the soil of the kingdom 

 is unequal to its wants; and the modes of 

 supplying the deficiency of animal manure 

 are not generally understood. Where the 

 species of husbandry admits of rotation, a 

 field is sometimes exhausted by the repetition 

 of the same crop , and left to recruit itself 

 by a period of absolute repose; and in Lan- 

 guedoc the vineyards are often prematurely 

 destroyed, that the soil may recover heart 

 by lying fallow, or by the substitution of 

 some other culture. 



In some parts of France agriculture has 

 made approaches to perfection ; but the zeal 

 of improvement is not widely diffused. Agri- 

 cultural societies exist in almost every de- 



1 See Davy's Elements of Agricultural Chemistry* 



