374 



BOARD OF AGRICULTURE. 



Potassium oxide (sulphate), . 

 Nitrogen, .... 

 Insoluble matter, . 



rer ceut. 



2.80 

 367 

 7.30 



Valuation per two thousand pounds : — 



30.8 pounds of soluble phosphoric acid, 



36. 2 pounds of reverted phosphoric acid, 



37. pounds of insoluble phosphoric acid, . 



56. pounds of sulphate of potash, 



73.4 pounds of nitrogen, 



$21 85 

 Ground Bone. 



(Hargraves Manufacturing Company ; collected of C. A. Lincoln, Taunton, Mass.) 



Per cent. 



Valuation per two thousand pounds : — 



182.6 pounds of reverted phosphoric acid, 

 265.2 pounds of insoluble phosphoric acid, . 

 72. pounds of nitrogen, .... 



$13 70 

 13 26 

 10 80 



$37 76 

 Soluble Pacific Guano. 

 (Collected of H. C. Haskell, Deerfield, Mass.) 

 Guaranteed composition : Moisture, 15 to 18| per cent. ; 

 total phosphoric acid, 12 to 14 per cent. ; soluble phospho- 

 ric acid, 6^ to 8 per cent. ; reverted phosphoric acid, 1| to 

 3 per cent. ; insoluble phosphoric acid, 2 to 4 per cent. ; 

 nitrogen, 2 to 3 per cent, (equivalent to ammonia, 2^ to 3^ 

 per cent.) ; potassium oxide, 2 to 3 percent.) 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



12.35 

 11.95 

 7.74 

 1.70 

 2.51 

 3.02 

 2.35 

 5 25 



