312 



BOAED OF AGRICULTUEE. 



Per cent. 

 Nitrogen (in organic matter), . . . . . .75 



Potassium oxide, 6.64 



Chlorine, 16.36 



Sulphuric acid, 15.02 



Insoluble matter, -20 



Valuation per two thousand pounds : — 



12.2 pounds of soluble phosphoric acid, 



49 6 pounds of reverted phosphoric acid, 

 187.6 pounds of insoluble phosphoric acid, 



15. pounds of nitrogen, 

 132.8 pounds of potassium oxide, 



$26 75 



Standard Superphosphate. 



(Standard Fertilizer Co., Boston, Mass.; collected of Slate & DeWolf, Greenfield, 



Mass.) 



Guaranteed composition : Ammonia, 3 to 4 per cent, 

 (equivalent to nitrogen, 2.5 to 3.3 per cent.) ; available 

 phosphoric acid, 9 to 13 per cent. ; soluble phosphoric acid, 

 2 to 3 per cent. ; potassium oxide, 2 to 4 per cent. 



Per cent. 



Valuation per two thousand pounds : — 



70.4 pounds of soluble phosphoric acid, 

 90.2 i)Ounds of reverted phosphoric acid, 

 93.2 pounds of insoluble phosphoric acid, 

 46.8 pounds of potassium oxide, 

 62.2 pounds of nitrogen, 



$33 78 

 Bradley^s Sea Fowl. 



(Collected of Sheldon & Newcomb, Greenfield, Mass.) 



Guaranteed composition: Nitrogen, 2\ to 31^ per cent, 

 (equivalent to ammonia, 3 to 4 per cent.) ; soluble phos- 

 phoric acid, 7 to 8 per cent. ; available phosphoric acid, 9 to 

 11 per cent. ; insoluble phosphoric acid, 2 to 3 per cent.; 

 potassium oxide, 2 to 3 per cent. 



