COMMERCIAL FERTILIZERS. 



299 



Valuation per two thousand pounds : - 



79.4 pounds of reverted phosphoric acid, 

 375.4 pounds of insoluble phosphoric; acid, 

 77. pounds of nitrogen. 



Fine Bones. 

 (From Lee, Blackburn & Co., Lawrence, Mass.) 



$8 05 

 16 89 

 13 86 



$38 80 



Valuation per two thousand pounds : - 



55. pounds of available phosphoric acid, 

 466.2 pounds of insoluble phosphoric acid, 

 59.8 pounds of nitrogen, 



$4 95 

 20 98 

 10 76 



$36 69 

 Darling''^ Fine Bone. 

 (Collected of Parker & Gannett, Boston, Mass.) 



Guaranteed composition : Total phosphoric acid, 25 per 

 cent. ; nitrogen, 3 to 4 per cent. 



Valuation per two thousand pounds : - 



135.4 pounds of reverted phosphoric acid, 

 397. pounds of insoluble phosphoric acid, 

 71.2 pounds of nitrogen, 



$42 88 



