COMMERCIAL FERTILIZERS. 



523 



Lowell Bone Fertilizer. 

 (Collected of O. G. Cobnrn, Lowell, Mass.) 



Guaranteed composition ; Total phosphoric acid, 10 to 12 

 per cent. ; soluble phosphoric acid, 8 to 10 per cent. ; in- 

 soluble phosphoric acid, 3 to 5 per cent. ; nitrogen, 2.5 to 

 4 per cent. 



Per cent. 



Moisture at 100° C, 16.59 



Total phosphoric acid, 12.57 



Soluble phosphoric acid, 5.42 



Reverted phosphoric acid, 6.33 



Insoluble j)hosphoric acid, .82 



Potassium oxide, 3.57 



Nitrogen, 2.30 



Insoluble matter, .73 



Valuation per two thousand pounds : - — 



108.4 pounds of soluble phosphoric acid, 

 126.6 pounds of reverted phosphoric acid, 

 16.4 pounds of insoluble phosphoric acid, 

 71.4 pounds of potassium oxide, . 

 46.0 pounds of nitrogen. 



|8 67 



9 50 



49 



3 03 



8 05 



S29 74 



Dow, Davis & Co.'s Pure Ground Bone. 

 (Collected of J. Stackpole & Sons, Ipswich, Mass.) 

 No guaranty obtained. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Nitrogen, 

 [nsoluble matter, . 



Per cent. 



9.03 

 26.59 

 none. 



6.63 

 19.96 



2.88 

 .19 



Valuation per two thousand pounds : — 



132.6 pounds of reverted phosphoric acid, . 



399.2 pounds of insoluble phosphoric acid, . 



67.6 pounds of nitrogen, .... 



$9 95 



19 96 



9 22 



$39 13 



