314 



BOARD OF AGRICULTURE. 



Stearns & Co.^s Ammoniated Bone Superphosphate. 

 (Collected of B. F. Bridges, Jr., So. Decrfield, Mass.) 



Guaranteed composition: Moisture, 12 to 15 per cent.; 

 nitrogen in organic matter, 2| to 3^ per cent, (equivalent to 

 ammonia, 31 to 4i- per cent.) ; soluble phosphoric acid, 6 

 to 8 per cent. ; reverted phosphoric acid, 2 to 3 per cent. ; 

 insoluble phosphoric acid, 1 to 3 per cent. ; potassium ox- 

 ide, 2 to 3 per cent. 



Per cent. 



13.20 



Moisture at 100° C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, 

 Insoluble matter, 



9.91 

 6.24 

 2.30 

 1.47 

 2.25 

 3 35 

 14.38 



Valuation per two thousand pounds : - 



104.8 pounds of soluble phosphoric acid, 

 46. pounds of reverted phosphoric acid, 

 29.4 pounds of insoluble phosphoi'ic acid, 

 45. pounds of potassium oxide, . 

 67. pounds of niti'ogen. 



Miles'' Ammoniated Bone Sujjerphosphate, 

 (Collected of D. J. Wright, Northampton, Mass.) 



f 10 44 



4 14 



1 32 



1 91 



13 40 



$31 21 



Guaranteed composition : Soluble and reverted phosphoric 

 acid, 8 to 12 per cent. ; potassium oxide, 2 to 3 per cent. ; 

 nitrogen, 2\ to 3^ per cent. 



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 : - 



133.6 pounds of soluble phosphoric acid, 

 22.8 pounds of reverted phosphoric acid, 

 81. pounds of insoluble phosphoric acid, 



