COMIklERCIAL FERTILIZERS. 



313 



Moisture at 100° C, 

 Total phosphoric acid, 

 Solul)lo phosphoric acid, 

 Reverted phosphoric acid, 

 Insolul)lc phosphoric acid, 

 Potassium oxide, 

 Nitrogen (in organic matter). 

 Insoluble matter, 



Per cent. 

 15.16 

 10.95 

 678 

 1.70 

 247 

 2.86 

 3.29 

 6.70 



Valuation per two thousand pounds : — 



135.6 pounds of soluble phosphoric acid, 

 84. pounds of i-cverted 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 Stq-)crphosphate. 

 (Collected of Slate & DeWolf, 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. 



Per cent. 



14^0 



9.54 



579 



Moisture at 100° C, 

 Total phosphDric acid, . 

 Soluble pliosplioric acid, 

 Reverted phosphoric acid, 

 Insoluble phosjjhoric acid 

 Potassium oxide, 

 Nitroijcn, 

 Insoluble matter. 



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 i-everted phosphoric acid, 

 50.0 pounds of insoluble phosphoric acid, 

 90.2 pounds of potassium oxide, . 

 67. pounds of nitrogen, . . 



$33 55 



