356 BOARD OF AGRICULTURE. 



Valuation per ton of two thousand pounds : — 



116.4 pounds of available phosphoric acid, . . $10 48 



45.6 pounds of insoluble phosphoric acid, . . . 2 74 



71.8 pounds of nitrogen, 17 23 



76.6 pounds of potassium oxide, 3 83 



$34 28 

 Horsefeet Ouajio. 



(Earle Phosphate Company, Providence, R. I.; sent on by George T. Holmes, Attle- 



borough, Mass. 



Per cent. 



Moisture, 16.40 



Organic and volatile matter, 49.92 



Ash constituents, 60 08 



Total phosphoric acid, 6.05 



Nitrogen, 2.78 



Potassium oxide, 70 



Calcium oxide, 5.07 



Insoluble matter, 23.15 



Valuation per ton of two thousand pounds : — 



121.0 pounds of total phosphoric acid, . . . . |7 26 



55.6 pounds of nitrogen, 13 35 



14.0 pounds of potassium oxide, 70 



$21 31 

 Peruvian Guano. 



(Sent on for examination from New York.) 



Per cent. 



Moisture, 16.54 



Organic and volatile matter, 36.08 



Ash constituents, 63.92 



Total phosphoric acid, 16.46 



Soluble phosphoric acid, 3.50 



Keverted phosphoric acid, .72 



Insoluble phosphoric acid, 12.24 



Nitrogen, 6'36 



Insoluble matter, 20.43 



Potassium oxide, 1-02 



Valuation per ton of two thousand pounds ; — 



70.0 pounds of soluble phosphoric acid, . 



14.4 pounds of reverted phosphoric acid, 

 244.8 pounds of insoluble phosphoric acid, 

 107.2 pounds of nitrogen, .... 



20.4 pounds of potassium oxide, 



$51 49 



