542 



BOARD OF AGRICULTURE. 



sium oxide, 2 to 4 per cent. ; nitrogen, 2.5 to 3 per cent. 

 Cequivalent to ammonia, 3 to 3.5 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted i^hosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



174.2 pounds of soluble phosj^horic acid, 

 46.0 poiands of reverted phosphoric acid, 

 12.0 jDounds of insoluble phosphoric acid, 

 74.0 pounds of potassimn oxide, . 

 66.0 j)Ounds of nitrogen, 



Per cent. 



19.27 

 11.61 

 8.71 

 2.30 

 .60 

 3.70 

 2.80 

 5.02 



$13 94 



3 45 



36 



3 15 



9 80 



$30 70 



Adams' Bone SuperpJiospJiafe. 



(Steams Fertilizer Co., New Yorli; collected of Wilson & Holden, Worcester, 



Mass.) 



Guaranteed composition : Available phosphoric acid, 8 to 



11 per cent. ; insoluble phosphoric acid, 1 to 3 per cent. ; 



potassium oxide, 2 to 3 per cent, (equivalent to potassium 



sulphate, 4 to 8 per cent.) ; ammonia, 2.5 to 3.5 per cent. 



(equivalent to nitrogen, 2.1 to 2.9 per cent.). 



Per cent. 



19.69 

 10.93 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



131.2 pounds of soluble phosphoric acid, 

 66.8 pounds of reverted phosphoric acid, 

 20.6 pounds of insoluble phosphoric acid, 

 84.6 pounds of potassium oxide, . 

 70.8 pounds of nitrogen, 



6.56 

 3.34 

 1.03 

 4.23 

 8.54 

 3.74 



$10 50 



5 01 



62 



4 65 



12 39 



$33 17 



