I 227 3 



" The beft kind is imported from hills in the vi- 

 cinity of Paris: it is brought down the Seine, and 

 exported from Havre- de- Grace. I am informed 

 there arc large beds of it in the Bay of Fundy, fome 

 of which I have feen nearly as good as that from 

 France i neverthelefs, feveral cargoes brought from 

 thence to Philadelphia have been ufed without 

 efFedt, It is probable this was taken from the top 

 of the ground, and by the influence of the fun and 

 atmofphere difpofleffed of the qualities neceflary 

 for the purpofes of vegetation. The lumps, com* 

 poftd of flat fliining fpccula, are preferred to thofe 

 which arc formed of round particles like fandj 

 the fimplc method of finding out the quality is to 

 pulverize fome, and put it dry into an iron pot 

 over the fire, when that which is good will foon 

 boil, and great quantities of the fixed air efcape 

 by ebullition. 



" It is pulverised by firft putting it in a ftamp- 

 ing-mill. The finer its pulverization the better, as 

 it will thereby be more generally diffufed. 



*^ It is beft to fow it in a wet day. The moft ap- 

 proved quantity for grafs is Cik bufhels per acre. 

 No art is required in fowing it, more than making 

 the diftribution as equal as pofljble on the fward of 

 grafs. It operates altogether as a top manure, and 

 Q^a therefore 



