COMMERCIAL FERTILIZERS. 



227 



E. Frank Cog's Bone Superphosphate of Lime. 

 (Enoch Coc, Hunters Point, N. Y.) 



Giiar.anteed composition : soluble and reverted phosphoric 

 acid (available), 1L96 per cent. ; insoluble phosphoric acid, 

 1.28 per cent. ; nitrogen, 2.64 per cent. 



Valuation per two thousand pounds : — 



irj6.8 pounds of soluble phosphoric acid, 

 8.G pounds of reverted phosphoric acid, 

 34. pounds of insoluble phosphoric acid, 

 60.8 pounds of nitrogen, . . . . 



^17 25 



69 



2 04 



11 68 



$31 66 

 DosworLh Eros' Stqjerjjhosjyhate of Lime, 

 (Collected of Wilson & Holden, Worcester, Mass.) 



Guaranteed composition : soluble phosphoric acid, 7 to 8 

 per cent. ; reverted phosphoric acid, 4 to 5 per cent. ; in- 

 soluble phosphoric acid, 2 to 5 per cent. ; potassium oxide, 

 2 to 3 per cent. ; nitrogen, 2 to 2.5 per cent. 



Valuation per two thousand pounds : — 



72. pounds of soluble phosphoric acid, 

 90.8 pounds of reverted phosphoric acid, 

 158. pounds of insoluble lihosphoric acid, 

 41.2 pounds of potassium oxide, 

 42.6 pounds of nitrogen, .... 



$7 92 

 7 26 

 9 48 

 1 75 

 9 80 



$36 21 



