372 



BOARD OF AGRICULTURE. 



Clark's Cove Quano. 



(Collected of Messrs. Parker & Gannett, Boston, Mass.) 



Moisture, .... 

 Organic and volatile matter, 

 Ash eonstitnents, 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, .... 

 Potassium oxide. 

 Insoluble matter. 



Per cent. 



16.82 



42.85 



57.15 



10.40 



8.19 



1.58 



0.63 



2.18 



2.26 



13.14 



Valuation per ton of two thousand pounds 



163.8 pounds of soluble phosphoric acid, . 

 81.6 pounds of reverted phosphoric acid, 

 12.6 pounds of insoluble phosphoric acid, 

 43.6 pounds of nitrogen, .... 



45.2 pounds of potassium oxide, 



$36 80 



Standard Superphosphate. 



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



Moisture, .... 

 Organic and volatile matter. 

 Ash constituents. 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Nitrogen, .... 

 Potassium oxide. 

 Magnesium oxide. 

 Insoluble matter. 



Per cent. 



20.89 



47.06 



52.94 



11.67 



5.92 



2.97 



2.78 



2.34 



1.30 



1.60 



4.32 



Valuation per ton of two thousand pounds : — 



118.4 pounds of soluble phosphoric acid, 

 59 4 pounds of reverted phosphoric acid, 

 55.6 pounds of insoluble phosphoric acid, 

 46.8 pounds of nitrogen, 

 26.0 pounds of potassium oxide^ 



$36 01 



