360 



BOARD OF AGRICULTURE. 



26.0 pounds of insoluble phosphoric acid, . . . f 1 56 



77.4 pounds of nitrogen, 18 58 



75.4 pounds of potassium oxide, 3 77 



$30 68 

 Bowker^s Hill and Drill. 



(Collected of Messrs. Breck & Son, Boston.) 



Per cent. 



Moisture, 16.60 



Organic and volatile matter, 38.79 



Ash constituents, 61.22 



Total phosphoric acid, 13.89 



Soluble phosphoi'ic acid, 4.67 



Reverted phosphoric acid, 3.40 



Insoluble phosphoric acid, 6.82 



Nitrogen, 2.65 



Insoluble matter, ........ 4.12 



Valuation per ton of two thousand pounds 



93.4 pounds of soluble phosphoric acid, 

 68.0 pounds of reverted phosphoric acid, 

 116.4 pounds of insoluble phosphoric acid, 

 53.0 pounds of nitrogen, .... 



Baiu Bone Phosphate. 



(E. H. Smith, Northborough, Mass.) 



Moisture, .... 

 Organic and volatile matter. 

 Ash constituents, 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Nitrogen, .... 

 Potassium oxide, 

 Insoluble matter. 



$37 50 



Per cent. 



11.36 



12.85 

 1.02 

 7.29 

 4.54 

 2.53 

 3.75 

 4.27 



Valuation per ton of two thousand pounds : — 



20.4 pounds of soluble phosphoric acid, 

 145.8 pounds of reverted phosphoric acid, 

 90.8 pounds of insoluble phosphoric acid, 

 50.6 pounds of nitrogen, 

 75.0 pounds of potassium oxide, 



$2 55 

 13 12 



5 45 

 12 15 



3 75 



$37 02 



