COMMERCIAL FERTILIZERS. 



497 



Moisture at 100° C, 

 Total ijhosplioric acid, . 

 Soluble phosphoric acid, 

 Reverted jihosphoric acid, 

 Insoluble i^hosjihoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



10.2 pounds of soluble phosphoric acid, 

 98.2 pounds of reverted phosphoric acid, 

 73.2 poiinds of insoluble phosphoric acid, 

 115.8 pounds of potassium oxide, 

 90.4 pounds of nitrogen, 



Per cent. 



19.17 

 9.08 

 .51 

 4.91 

 3.66 

 5.79 

 4.52 

 6.34 



$0 82 

 7 37 

 2 20 

 6 37 



15 82 



$32 58 



Quinnipiac Potato Manure. 

 (Collected of B. L. Bragg & Co., Springfield, Mass.) 



Guaranteed composition : Available phosphoric acid, 5 to 

 7 per cent. ; insoluble phosphoric acid, 1 to 3 per cent. ; 

 potassium oxide, 6 to 8 per cent, (equivalent to potassium 

 sulphate, 11 to 15 per cent.) ; nitrogen, 3,25 to 4.25 pei 

 cent, (equivalent to ammonia, 4 to 5 per cent.). 



Per cent. 



Moisture at 100° C, 9.39 



Total phosphoric acid, 9.82 



Soluble phosphoric acid, 2.90 



Reverted jihosphoric acid, 4.61 



Insoluble phosphoric acid, 2.31 



Potassium oxide, 6.38 



Nitrogen, 3.62 



Insoluble matter, 5.01 



Valuation per two thousand pounds : 



68. pounds of soluble phosphoric acid, 

 92.2 pounds of reverted phosphoric acid, 

 46.2 pounds of insoluble phosphoric acid, 

 107.6 pounds of potassium oxide, . 

 72.4 pounds of nitrogen, 



$4 64 

 6 92 

 1 39 

 6 92 



12 67 



$31 64 



