302 



BOARD OF AGRICULTURE. 



Valuation per two thousand pounds : — 



115.2 pounds of soluble phosphoric acid, 

 30.2 pounds of reverted phosphoric 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), 



$11 52 



2 72 



3 77 

 1 87 

 7 24 



1 63 



2 20 



$30 95 



Stockbridge Manures (Potato). 

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



Guaranteed composition : Total phosphoric acid, 8 

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

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

 per cent. 



Moisture at 100° C, 

 Total phosphoric acid. 

 Soluble phosphoric acid, 

 Reverted phosphoric aci( 

 Insoluble phosphoiic acid 

 Nitrogen, 

 Potassium oxide. 

 Insoluble matter, 



Per 



17 

 11 

 7 

 1 

 2 

 3 

 4 

 4, 



, Mass.) 



to 10 

 8 per 

 to4L 



cent. 



,60 

 .19 

 .23 

 .48 

 .48 

 .96 

 .29 

 ,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 Ammoniated Bone StqyerjyhosjJhatc. 

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



$38 84 



Guaranteed composition : Soluble phosphoric acid, 6 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. ; S^ to 4^ 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 



