308 



BOAED OF AGRICULTURE. 



Valuation per two thousand pounds : — 



11.6 pounds of soluble phosphoric acid,. 

 48.8 pounds of reverted phosphoric acid, 

 218.8 pounds of insoluble phosphoric acid, 

 87.8 pounds of potassium oxide, 

 42.8 pounds of nitrogen (in organic matter), 

 12.8 pounds of nitrogen (in ammonia salts), 

 6.6 pounds of nitrogen (in nitrates), . 



$31 62 

 Quinnipiac Go's Phosphate. 



(Collected of Robinson & Brooks, Palmer, Mass.) 



Guaranteed composition : Nitrogen, 2^ to 3-| per cent, 

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

 phoric acid, 1 to 3 per cent. ; soluble and reverted phos- 

 phoric acid (available), 8 to 10 per cent. ; potassium oxide, 

 2 to 3 per cent. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Nitrogen, 

 Potassium oxide, 



Valuation per two thousand pounds : 



139.4 pounds of soluble phosphoric acid, 

 15.2 pounds of reverted phosphoric acid, 

 88.6 pounds of insoluble phosphoric acid, 

 63.6 pounds of nitrogen, . 

 49.4 pounds of potassium oxide, . 



131 87 



