240 



BOARD OF AGRICULTUEE. 



Valuation per two thousand pounds : — 



138.8 pounds of soluble phosphoric acid, 

 29.8 pounds of reverted phosphoric acid, 

 70.4 pounds of insoluble phosphoric acid, 

 3G.G pounds (f potassium oxide, 

 45. pounds of nitrogen. 



Bowkcr''s Hill and Drill PhosjyJiate. 

 (Collected of C. T. Brown, Northampton, Mass.) 



$15 27 



$33 78 



Guaranteed composition : total phosphoric acid, 10 to 12 

 per cent. ; soluble and reverted phosphoric acid (available), 

 8 to 10 per cent. ; ammonia, 2.5 to 3.5 per cent, (equivalent 

 to nitrogen, 2 to 2.8 per cent.) ; potassium oxide, 2 to 3 

 per cent, (in form of sulphate). 



Moisture at 100° C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, 



Nitrogen, 



Valuation per two thousand pounds : — 



1C5.2 pounds of soluble phosphoric acid, 

 20. pounds of reverted phosphoric acid, 

 24 2 pounds of insoluble phosphoric acid, 

 37. pounds of potassium oxide, . 

 48.4 pounds of nitrogen. 



Per cent. 

 15.50 

 10.47 

 8.26 

 1.00 

 1.21 

 1.85 

 2.42 



$18 17 

 1 60 



1 45 



2 59 

 11 13 



$34 94 



Bowker's Lawn Dresser. 

 (Collected of C. T. Brown, Northampton, Mass.) 



Guaranteed composition : total phosphoric acid, 6 to 8 

 per cent. ; soluble and reverted phosphoric acid (available), 

 5 to per cent. ; potassium oxide, 4 to 5 per cent. ; nitro- 

 gen, 4 to 5 per cent. 



Moisture at 100° C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 



Per cent. 



10.83 



7.86 



5.09 



.64 



