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- 



f See Davy's Elements of Agricultural Chemistry. 



