344 



BOARD OF AGRICULTURE. 



Valuation per ton of two thousand pounds : — 



64.4 pounds of nitrogen $12 88 



169.4 pounds of soluble phosphoric acid . . . 21 18 



28.2 pounds of reverted phosphoric acid . . 2 54 



14.8 pounds of -insoluble phosphoric acid . . 89 



$37 49 



xvn. 



Soluble Nitrogenous Phosphate. 



(Manufactured by the Quinnipiac Fertilizer Co., New Haven, Conn.; collected 

 of D. A. noiton, Northampton, Mass.) 



Per cent. 



Moistiu-e lost at 100° C 26.50 



Total nitrogen . 3.54 



Total phosphoric acid ■ 10.69 



Phosphoric acid soluble in water .... 7.36 



Reverted phosphoric acid ..... .47 



Insoluble phosphoric acid . . . . .2.86 



Potassium oxide . . . . . . .1.25 



Insoluble matter, sand, &c 1.60 



Valuation per ton of two thousand pounds : — 



70.8 pounds of nitrogen $14 16 



147.2 pounds of soluble phosphoric acid . . . 18 40 



9.4 poiuids of reverted phosphoric acid . . 85 



57.2 pounds of insoluble phosiDhoric acid . . 3 4S 



25 pounds of potassium oxide . . . . 1 17 



$38 01 



xvm. 



Pine-Island Phosphate. 



(Quinnipiac fertilizer Company, New Haven, Conn. ; collected of D. A. Horton, 



Northampton, Mass.) 



Moisture lost at 100° C. . 

 Total nitrogen 

 Total phosphoric acid 

 Phosphoric acid soluble in water 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Potassium oxide 



Per cent. 



20.00 

 6.14 

 7.42 

 2.07 

 2.46 

 2.89 

 2.17 



Valuation per ton of two thousand pounds : — 



122.8 pounds of nitrogen $24 56 



41.4 pounds of soluble phosphoric acid . . . 5 18 

 49.2 pounds of reverted phosphoric acid . . .4 4^ 



