302 



BOARD OF AGRICULTURE. 



$11 52 



Valuation per two thousand pounds : — 



115.2 pounds of soluble phosphoric acid, 

 30.2 pounds of reverted jjhosphoric acid, 

 83.8 pounds of insoluble phosphoric acid, 

 44. pounds of potassium oxide, 

 36.2 pounds of nitrogen (in organic matter), 

 7.4 pounds of nitrogen (in ammonia salts), 

 12.2 pounds of nitrogen (in nitrates), 



130 95 

 Stockbridge Manures (Potato). 



(Bowker Fertilizer Co., Boston, Mass. ; collected of R. T. Prentiss, Holyokc, Mass.) 



Guaranteed composition : Total phosphoric acid, 8 to 10 

 per cent. ; soluble and reverted phosphoric acid, 7 to 8 per 

 cent. ; potassium oxide, 5 to 6 per cent. ; nitrogen, 3| to 4^ 

 per cent. 



Moisture at 100° C, 

 Total phosphoric acid. 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Nitrogen, 

 Potassium oxide, 

 Insoluble matter, 



Per cent. 

 17.60 

 11.19 

 7.23 

 1.48 

 2.48 

 3.96 

 4.29 

 4.40 



Valuation per two thousand pounds : - 



144.6 pounds of soluble phosphoric acid, 

 29.6 pounds of reverted phosphoric acid, 

 49.6 pounds of insoluble phosphoric acid, 

 79.2 pounds of nitrogen, 

 85.8 pounds of potassium oxide, 



Crocker''s Aminoniated Bone Siiperphosj^hale. 

 (Collected of R. T. Prentiss, Holyoke, Mass.) 



138 81 



Guaranteed composition : Soluble phosphoric acid, (! to 

 8 per cent. ; reverted phosphoric acid, 2 to 4 per cent. ; in- 

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

 1 to 3 per cent. ; 3| to 41^ per cent, of nitrogen. 



Moisture at 100° C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 



Per cent. 



12.18 



11.98 



6.65 



1.87 



