382 



BOARD OF AGRICULTURE. 



verted phosphoric ac'd, 2 to 3 per cent. ; nitrogen, 2| to 3| 

 per cent, (equivalent to ammonia, 3 to 4 per cent.) ; potas- 

 sium sulphate, 3.7 to 5.55 per cent, (equivalent to potassium 

 oxide, 2 to 3 per cent.). 



Moisture at 100= C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Revert:ed phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



163.2 pounds of soluble phosphoric acid, 

 57.4 poimds of reverted phosphoric acid, 

 45. pounds of insoluble phosphoric acid, 

 32. pounds of potassium oxide, 

 54.6 pounds of nitrogen, 



Extra Fine Ground Bone with Potash. 

 (Bradley Fertilizer Company, Boston; collected of H. P. Lucas, Pittsfield, Mass.) 

 Guaranteed composition : Moisture 10 to 20 per cent. ; 

 total phosphoric acid, 8 to 12 per cent. ; nitrogen, 2.25 to 

 3.25 per cent. ; potassium oxide, 2 to 3 per cent. 



rer cent. 



Moisture at 109° C, 7.08 



Total phosphoric acid, 12.65 



Soluble phosphoric acid, 



Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



61.4 pounds of soluble phosphoric acid, 

 103.6 pounds of reverted phosphoric acid, 

 88. pounds of insoluble phosphoric acid, 

 44. pounds of potassium oxide, . 

 43 6 pounds of nitrogen. 



3.07 

 5.18 

 4.40 

 2 20 

 2.18 

 2.82 



84 91 

 7 77 

 2 64 

 1 87 

 7 41 



$24 60 



