Inabulldtin from tlie tinoae isianu station farmers are cautiosed to bear iu mind that ihe commercial valuation : the only thing to be taken into , a buying a fertffizer. To iUustl ppose rliat the erop and Foil deinand Iargely phosphoric acid h id , little nitrogen; fchena with a high percentage of m, a, but Iüw in the other eleinents, vvoula be of little value to the farmer, hojrover Mgh its commercial value migVit be. The question is not how many poïtndsof fertüizer forthe money, but. how much potash, phosphoric acid and nitogen and their fonn. This quesI tion involves in a great measure the profits and losses in New England f arm' ing.