COMIMERCIAL FERTILIZERS. 207 



Darling^s Fine Bones. 



(Collected of Parker and Gannet, Boston, Mass.) 



Per cent. 



Moisture at 100° C 7.10 



Total phosphoric acid, 25.45 



Nitrogen, 2 90 



Insoluble matter, .45 



Valuation per two thousand pounds : — 



509. pounds of insoluble phosphoric acid, . . . |30 54 

 58. pounds of nitrogen, 13 34 



$43 88 



Qround Fine Bones. 



(Bowker Fertilizer Co., Boston, Mass.) 



Per cent. 



Moisture at 100° C , 6.53 



Total phosphoric acid, . 23.82 



Nitrogen, 3.83 



Valuation per two thousand pounds : — 



476.4 pounds of insoluble phosphoric acid, . . . $28 58 

 76.6 pounds of nitrogen, 17 62 



$16 20 



Eolyoke Fine Bones. 



(Collected of D. A. Horton, Northampton, Mass.) 



Per cent. 



Moisture at 100° C, 9.50 



Total phosphoric acid, 24.96 



Nitrogen, 3.97 



Insoluble matter, .38 



Valuation per two thousand pounds : — 



499.2 pounds of insoluble phosphoric acid, . , .$29 95 

 79.4 pounds of nitrogen, 18 26 



$18 21 



IV. — Complete Manures and Ammoniated SuPERpnospnAXEs. 



Peruvian Guano. 

 (Collected of D. A. Horton,. Northampton, Mass.) 



Guaranteed composition : total phosphoric acid, 16 to 18 



