COMMERCIAL FERTILIZERS. 



313 



Moisture at 100° C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, 

 Nitrogen (in organic matter), 

 Insoluble matter. 



Per cent. 

 15.16 

 10.95 

 6.78 

 1.70 

 2.47 

 2.86 

 3.29 

 6.70 



Valuation per two thousand pounds : — 



135.6 pounds of soluble phosphoric acid, 

 34. pounds of reverted phosphoric acid, 

 49.4 pounds of insoluble phosphoric acid, . 

 57.2 pounds of potassium oxide, . 

 65.8 pounds of nitrogen, .... 



$34 43 



L. L. Crocker's Potato and Hop Superj^hosphate. 

 (Collected of Slate & De\7olf, Greenfield, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 6 to 8 

 per cent. ; precipitated phosphoric acid, 2 to 4 per cent. ; 

 insoluble phosphoric acid, 1 to 2 per cent. ; ammonia, 2^ to 

 3^ per cent, (equivalent to nitrogen, 2 to 2.9 per cent.) ; 

 potassium oxide, 6 to 8 per cent. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid 

 Potassium oxide. 

 Nitrogen, 

 Insoluble matter, 



Per cent. 



14 50 

 9.54 

 5.79 

 1.22 

 2.53 

 4.81 

 3.35 

 4.65 



Valuation per two thousand pounds : — 



115.8 pounds of soluble phosphoric acid, 

 24.4 pounds of reverted phosphoric acid, 

 50.6 pounds of insoluble phosphoric acid, 

 96.2 pounds of potassium oxide, . 

 67. pounds of nitrogen, 



$33 55 



