224 



BOARD OF AGRICULTURE. 



Soluble Pacific Ouano, 



(Pacific Guano Co., Boston, Mass. ; collected of J. S. Clark and Son, Worcester, 



Mass.) 



Guaranteed composition : soluble phosphoric acid, 6.5 to 8 

 per cent. ; reverted phosphoric acid, 1.6 to 3 per cent. ; in- 

 soluble phosphoric acid, 2 to 3 per cent. ; potassium oxide, 

 2 to 3.5 per cent. ; nitrogen, 2 to 3 per cent. 



Moisture at 100° C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen (in organic matter), 

 Nitrogen (in nitrates), 



Valuation per two thousand pounds : — 



137.4 pounds of soluble phosphoric acid, 

 23.4 pounds of reverted phosphoric acid, 



100.6 pounds of insoluble phosphoric acid, 

 32. pounds of potassium oxide, . 

 34. pounds of nitrogen (in organic matter), 

 3.4 pounds of nitrogen (in nitrates), . 



$32 88 



Quinnipiac Co.'s Phosphate. 

 (Collected of Wm. H. Earle, Worcester, Mass.) 



Guaranteed composition : soluble and reverted phosphoric 

 acid (available), 8 to 10 per cent.; insoluble phosphoric 

 acid, 1 to 3 per cent. ; potassium oxide, 2 to 3 per cent. ; 

 nitrogen, 2.5 to 3.5 per cent. 



Moisture at 100° C , . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen (in organic mattei-). 

 Nitrogen (in nitrates). 



Per cent. 



19.10 



11.03 



7.96 



1.45 



J 62 



2.04 



2.08 



79 



