502 



BOAED OF AGRICULTURE. 



Valuation per two thousand pounds : — 



97.2 pounds of soluble phosphoric acid, 

 83.2 pounds of reverted phosphoric acid, 

 94. pounds of insoluble phosjihoric acid, 

 102.4 pounds of potassium oxide, . 

 72. pounds of nitrogen. 



$7 78 

 6 24 

 2 82 

 4 35 



12 60 



133 79 



Cumberland Superphosphate. 



(Cumberland Bone Company, Portland, Me.; collected of B- F. Bridges Jr., South 



Deerlield, Mass.) 



Guaranteed composition: Total phosphoric acid, 11 to 14 

 per cent. ; soluble phosphoric acid, 5 to 7 per cent. ; re- 

 verted phosphoric acid, 1 to 3 per cent. ; insoluble phos- 

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

 cent. ; ammonia, 2.42 to 3.63 per cent, (equivalent to nitro- 

 gen, 2 to 3 per cent.). 



Per cent. 



Moistiire at 100° C, 18.22 



Total phosphoric acid, 13.06 



Soluble phosphoric acid, 6.76 



Reverted phosphoric acid, 3.39 



Insoluble phosphoric acid, 2.91 



Potassium oxide, 3.54 



Nitrogen, 2.86 



Insoluble matter, 4.40 



Valuation per two thousand pounds : — 



135.2 pounds of soluble phosphoric acid, 

 67.8 povmds of i-e verted phosj^horic acid, 

 68.2 pounds of insoluble phosphoric acid, 

 70.8 pounds of potassium oxide, . 

 67.2 pounds of nitrogen, 



$30 68 



Dole's " Special Fertilizer for Onions and Root Croj^s." 



(Dole Fertilizer Company, Boston, Mass.; collected of B. F. Brid{,'es, Jr., South 



Deerfield, Mass.) 



Guaranteed composition : Total phosphoric acid, 6 to 8 

 percent.; potassium sulphate, 6 to 8 percent.; ammonia, 

 4 to 6 per cent, (equivalent to nitrogen, 3.3 to 5 per cent.). 



