500 



BOARD OF AGRICULTURE. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



13.25 

 11.98 

 8.18 

 2.47 

 1.33 

 3.91 

 2.65 

 4.48 



Valuation per two thousand pounds : — 



163.6 pounds of soluble phosphoric acid, 

 49.4 pounds of reverted phosphoric acid, 

 26.6 pounds of insoluble i^hosphoric acid, 

 78.2 pounds of potassium oxide, . 

 63. jjounds of nitrogen, 



$13 09 



3 91 

 80 



4 30 

 9 28 



$31 38 



Crochefs Ammoniated Bone SuperpJiospJiate. 



(Crocker's BufiFalo Fertilizer Company, Buffalo, N. Y ; collected of E. N. Smith, 

 Sunderland, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 6 to 8 

 per cent. ; precipitated phosphoric acid, 2 to 4 per cent. ; 

 insoluble phosphoric acid, 1 to 2 per cent. ; potassium sul- 

 phate, 1 to 3 per cent. ; ammonia, S^ to 4| per cent, 

 (equivalent to nitrogen, 2.9 to 3.7 per cent.). 



Per cent. 



Moisture at 100° C, 12.07 



Total phosphoric acid, 11.61 



Soluble phosphoric acid, 7.80 



Reverted phosphoric acid, 2.24 



Insoluble phosphoric acid, 1.57 



Potassium oxide, 1.58 



Nitrogen, 3.60 



Insoluble matter, 4.61 



Valuation per two thousand pounds : 



156. pounds of soluble phosphoric acid, 

 44.8 pounds of reverted phosphoric acid, 

 31.4 poimds of insoluble phosphoric acid, 

 31.6 poimds of potassium oxide, . 

 72. poimds of nitrogen, 



$31 12 



