TANTTHE5. 49 



rtirth or the like. Many experiments made with it have 

 proved contradictory. In some, it has been shown to be 

 useless for clovers, while it has proved of great service to 

 ral of the grasses. Salt enhances its effects. In an 

 <'. \pcriment made in England with potatoes, on three sepa- 

 rate acres of land of equal quality one without manure, 

 gave 160 bushels ; one manured with 30 bushels of soot, 

 yielded 196 ; and the third, which received the same quan- 

 tity of soot and seven bushels of salt, yielded 236. 



