COMMERCIAL FERTILIZERS. 



227 



Valuation per ton of two thousand pounds 



97 pounds of nitrogen ..... 

 113 pounds of phosphoric acid 

 40 pounds of potassium oxide 



Guaranteed Peruvian Guano. 

 (Messrs. Rice Brothers, Worcester, Mass.) 



Moisture lost at 100° C. 

 Organic and volatile matter 

 Ash constituents . 

 Total phosphoric acid . 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Potassium oxide 

 Nitrogen 

 Insoluble matter . 



Valuation per ton of two thousand pounds 



122.2 pounds of soluble phosphoric acid 

 152.2 pounds of insoluble phosphoric acid 

 67.8 pounds of reverted phosphoric acid 

 52 pounds of potassium oxide . 

 155.4 pounds of nitrogen 



$19 40 

 6 78 

 2 40 



§28 58 



Per cent. 



16.25 



53.40 



46.60 



17.11 



6.11 



3.39 



7.61 



2.60 



7.77 



4.76 



$14 66 



9 13 



6 11 



2 34 



31 08 



$63 32 



Mineral Phosphates. 

 I. 



Curagoa Guano. 



(Sent on for examination.) 



Moisture lost at 100° C. 

 Organic and volatile matter 

 Ash constituents . 

 Total phosphoric acid . 

 Insoluble phosphoric acid 

 Reverted phosphoric acid 

 Calcium oxide 



Valuation per ton of two thousand pounds : — 



397.6 pounds of insoluble phosphoric acid 

 67 pounds of reverted phosphoric acid 



$25 91 



