326 



BOARD OF AGRICULTURE. 



VIII. 



Bowker's Hill and Drill Phosphate. 



Valuation per ton of two thousand pounds : — 



206.8 pounds of soluble phosphoric acid . 

 19.4 pounds of reverted phosphoric acid 

 30.6 pounds of insoluble phosphoric acid 

 70.2 pounds of nitrogen 



IX. 



" Bay State " Bone Superphosphate of Lime. 



$42 45 



(J. A. Tucker, Boston, Mass. ; collected of Messrs. 



cester, Mass.) 



Moisture at 100° C. 

 Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Potassium oxide 

 Nitrogen 



J. A. 



Valuation per ton of two thousand pounds 



184.0 pounds of soluble phosphoric acid. 

 37.8 pounds of reverted phosphoric acid 

 4.2 pounds of insoluble phosphoric acid 

 12.4 pounds of potassium oxide 

 50.6 pounds of nitrogen . . . 



$40 82 



