COMMERCIAL FERTILIZERS. 



373 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, . . . ' 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



35. G pounds of reverted phosphoric acid, 

 15.4 pounds of insoluble phosphoric acid, . 

 8.2 pounds of potassium oxide, . 

 2). 8 pounds of nitrogen, .... 



I'er cent. 



17.05 



2.55 



none. 



1.78 



.77 



.41 



1.04 



37.48 



32 67 



46 



35 



3 54 



$7 02 



W. J. Bright mail & Co.'s Fish and Potash. 

 (Collected of A. P. Slade, Somerset, Mass.) 



Guaranteed composition : Total phospiioric acid, 5 to 6 per 

 cent. ; potassium sulphate, 3 to 4 per cent. ; ammonia, 4 to 

 5 per cent, (equivalent to nitrogen, 3.3 to 4.1 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 



Niti'ogen 



Insoluble matter, . 



Valuation per two thousand pounds : — 



29. pounds of soluble phosphoi'ic acid, 

 36 2 pounds of reverted phosphoric acid, 

 37. pounds of insoluble phosphoric acid, 

 56. pounds of potassium oxide, . 

 73.4 pounds of nitrogen, 



Fish and Potash. 



22.75 

 5 20 

 1.45 

 1.81 

 185 

 2.80 

 3.67 

 7.30 



$2 32 



2 72 

 1 11 



3 08 

 12 48 



$21 71 



(Collected of W. J. Brighnnaii & Co., Tiverton, R. I., by A. P. Slade, Somerset, 



Mass.) 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 



Per cent. 

 22.75 

 5.20 

 1.54 

 1.81 

 1.85 



