COMMERCIAL FERTILIZERS. 



503 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Niti'ogen, 

 Insoluble matter, . 



Per cent. 



lO.GO 

 8.55 

 3.53 

 2.88 

 2.14 

 4.61 

 4.06 

 4.58 



Valuation per two thousand pounds : — 



70.6 potmds of soluble phosphoric acid, . 

 57.6 poimds of reverted phosphoric acid, 

 42.8 poimds of insoluble phosphoric acid, 

 92.2 pounds of potassium oxide, 

 81.2 pounds of nitrogen, .... 



$30 53 



George W. Miles' Fish and Potash. 

 (Collected of B. F. Bridges, South Deerfleld, Mass.) 



Guaranteed composition : Soluble and reverted phosphoric 

 acid, 5 to 8 per cent. ; insoluble phosphoric acid, 1 to 3 per 

 cent. ; potassium sulphate, 4 to 6 per cent. ; ammonia, 3 to 

 6 per cent, (equivalent to nitrogen, 2.5 to 5 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassimn oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



14.80 

 9.60 

 5.73 

 1.78 

 1.99 

 3.03 

 3.31 

 5.60 



Valuation per two thousand pounds : — 



114.6 pounds of soluble phosphoric acid, 

 35.6 poimds of reverted phosphoric acid, 

 39.8 pounds of insoluble phosphoric acid, 

 60.6 pounds of potassium oxide, . . 

 66.2 pounds of nitrogen, . . . 



$27 95 



