348 



BOARD OF AGRICULTURE. 



Bay State Bone Superphosphate. 

 (J. A. Tucker & Co , Boston ; collected of J. S. Clark & Son, Worcester, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 7 to 10 

 per cent. ; reverted and insoluble phosphoric acid, 1.5 to 3 

 per cent. ; nitrogen, 2 to 3 per cent, (equivalent to ammo- 

 nia, 2.75 to 3.5 per cent.). 



Moisture at 100° C, 

 Total phosi^horic acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : 



164.4 pounds of soluble phosphoric acid, 

 36.2 pounds of reverted phosphoric acid, 

 25 6 pounds of insoluble phosphoric acid, 

 71 8 pounds of nitrogen, 



Per cent. 



20.60 

 11.31 

 8.22 

 1.81 

 1.28 

 3 59 

 .8S 



$13 15 

 2 72' 



77 

 12 21 



$28 85 

 Bowker's Hill and Drill Phosphate. 

 (Collected of Earle & Peckham, Worcester, Mass.) 



Guaranteed composition : Total phosphoric acid, 11 to 13 

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

 verted phosphoric acid, 1 to 2 per cent. ; potassium oxide 

 (sulphate), 2 to 3 per cent. ; nitrogen, 2.5 to 3.25 per cent, 

 (equivalent to ammonia, 3 to 4 per cent.). 



Per cent. 



Moisture at 100° C, 12.78 



Total phosphoric acid, . . . . . . . 11 60 



Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



130.4 poimds of 

 55.4 pounds of 

 46.2 poimds of 

 25. pounds of 

 56. i^ounds of 



soluble i^hosphoric acid, 

 reverted phosphoric acid, 

 insoluble phosphoric acid, 

 potassium oxide, . 

 nitrosren. 



$26 88 



