COMMERCIAL FERTILIZERS. 



391 



potassium oxide, 2i to 4 per cent. ; ammonia, 3 to 4 per 

 cent, (equivalent to nitrogen, 2.5 to 3.3 per cent.). 



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 : 



184.2 pounds of soluble phosphoric acid, 

 55.2 pounds of reverted j)hosphoric acid, 

 24.4 pounds of insoluble phosphoric acid, 

 40.2 pounds of potassium oxide, . 

 61.6 pounds of nitrogen. 



Per cent. 



10.78 

 13.19 

 9.21 

 2.76 

 1.22 

 2.01 

 3.08 

 5.05 



114 74 



4 14 



73 



1 71 



10 47 



;i 79 



Standard Superphosphate. 

 (Standard Fertilizer Company, Boston ; collected of C. H. Thompson, Boston, Mass.) 

 Guaranteed composition : Available phosphoric acid, 9 to 

 13 per cent. ; insoluble phosphoric acid, 2 to 3 per cent. ; 

 potassium oxide, 2^ to 4 per cent. ; ammonia, 3 lo 4 per 

 cent, (equivalent to nitrogen, 2.V to 3.3 per cent.). 



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 : 



174.6 pounds of soluble phosphoric acid, 

 68.2 pounds of reverted phosphoric acid, 

 38. pounds of insoluble phosphoric acid, 

 38.8 pounds of potassium oxide, . 

 63.6 pounds of nitrogen. 



14.87 

 13.54 

 8.73 

 2.91 

 1.90 

 1.94 

 3.18 

 4.60 



$13 97 



4 37 



1 14 



I 65 



10 81 



$31 94 



BangJi's Economical Fertilizer. 



(Manufactured by Baugh & Sons, Philadelphia; collected of J. C. Stanley, New- 



buryport, Mass.) 



Guaranteed composition : Available phosphoric acid, 5 to 

 6 per cent. ; bone phosphate, 7 to 8 per cent. ; potassium 



