228 



BOARD OF AGRICULTURE. 



Bowkefs Hill and Drill Phosphate. 

 (Collected of J. .ind J. A. Rice, Worcester, Mass.) 



Guaranteed composition : soluble phosphoric acid, 8 to 10 

 per cent. ; potassium oxide, 2 to 3 per cent. ; ammonia, 2 

 to 3 per cent, (equivalent to nitrogen, 1.6 to 2.5 per cent.). 



Per cent. 

 Moisture at 100° C $16. 95 



Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, .... 

 Insoluble matter, 



Valuation per two thousand pounds : — 



147.8 pounds of soluble phosphoric acid, 

 21. pounds of reverted phosphoric acid, 

 9.4 pounds of insoluble jihosphoric acid, 

 25.8 pounds of potassium oxide, . 

 46.4 pounds of nitrogen. 



8.91 

 7.39 

 1.05 

 .47 

 1.29 

 2 32 

 4 12 



$16 26 



1 68 



56 



1 10 



10 67 



$30 27 

 Bay State Ammoniatcd Bone StiperpJiosjyhate. 

 (Collected of J. S. Clark & Son, Worcester, Mass.) 



Guaranteed composition : soluble and reverted phosphoric 

 acid (available), 9 to 10 per cent.; insoluble phosphoric 

 acid, 2 to 3 per cent. ; ammonia, 3.5 to 4. per cent, (equiva- 

 lent to nitrogen, 2.9 to 3.3 per cent.). 



Moisture at 100^^ C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Nitrogen, . . . . 



Valuation per two thousand po 



Per cent. 

 26.78 

 10.10 

 7.33 

 1.25 

 1.52 

 3.30 



mds : — 



146 6 pounds of soluble phosphoric acid, 

 25. pounds of reverted phosphoric acid, 

 30.4 pounds of insoluble phosj»horic acid, 

 66. pounds of nitrogen, 



$35 13 



