( 57 



100.0 

 Payen and Bousslngault have found, that 

 the soot of coal contains more nitrogenous 

 matter than that of wood. It is spread over 

 clover and young wheat in the proportion of 

 12 to 15 bushels per acre, and it should only 

 be applied in a calm and rainy season, accord- 

 ing to the recommendation of Mathieu of 

 Dombasle. Soot is used in Flanders for cole- 

 seed, in the proportion of sixty bushels per 

 acre; it is supposed that they preserve the 

 young plants against the attack of insects. Its 

 cost varies from thirty to forty cents per 100 

 pounds. 



Picardy Ashes. These ashes result from 

 the slow and incomplete combustion of the 

 pyritous peats used for the manufacture of 

 alum and sulphate of iron. When the peat is 



