COMMERCIAL FERTILIZERS. 



321 



41.6 pounds of nitrogen (in organic matter), 

 10.2 pounds of nitrogen (in ammonia salts), 

 37.8 pounds of potassium oxide, . 



Pacific Island Phosphate, 

 (Collected of H. C. Haskell, Deerfield, Mass.) 



18 32 

 2 24 

 1 61 



$36 40 



Guaranteed composition : Ammonia, 1 to 2 per cent, (equi- 

 valent to nitrogen, .8 to 1.6 per cent.) ; bone phosphate, 26 

 to 30 per cent. ; sulphate of potash, 12 to 15 per cent. 



Moisture at 100° C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen, .... 

 Sulphuric acid, 

 Insoluble matter, 



Per cent. 



14.87 



11.21 



.24 



4.09 



G.88 



6.07 



.73 



16.53 



.27 



Valuation per two thousand pounds : — 



4.8 pounds of soluble phosphoric acid, 

 81.8 pounds of reverted phosphoric acid, 

 137.6 pounds of insoluble phosphoric acid, 

 121.4 pounds 6f potassium oxide, . 

 14.6 pounds of nitrogen. 



$25 75 

 E. Frank Coe's Bone Superphosphate of Lime. 



(Collected of Clark & Son, Worcester, Mass.) 



Guaranteed composition : Soluble and reverted phos- 

 phoric acid (available), 11.96 per cent.; insoluble phos- 

 phoric acid, 1 to 2.8 per cent. ; nitrogen, 2.64 per cent, 

 (equivalent to ammonia, 3.2 per cent.). 



Per cent. 



Moisture at 100° C, 23 33 



Total phosphoric acid, 11.04 



Soluble phosphoric acid, 8.35 



Reverted phosphoric acid, 1.87 



Insoluble phosphoric acid, . . ... .82 



Potassium oxide, 1 .63 



Nitrogen, 2.68 



Insoluble matter, .68 



