COMMERCIAL FERTILIZERS. 



351 



Insoluble phosphoric acid 



Nitrogen 



Potassium oxide 



Per cent. 



1.77 

 4.10 

 5.65 



Valuation per ton of two thousand pounds : 



132.4 pounds of soluble phosphoric acid 

 38.2 pounds of reverted phosphoric acid 

 35.4 pounds of insoluble phosphoric acid 

 82 pounds of nitrogen 



113 pounds of potassiunn oxide . 



147 44 



Pine-Island Guano. 

 (Collected of Messrs. Horton & Phelps, Northampton, Mass.) 



Moisture .... 

 Organic and volatile matter 

 A.sh constituents 

 Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Nitrogen 

 Potassium oxide 

 Insoluble matter 



Valuation per ton of two thousand pounds 



112 pounds of soluble phosphoric acid . 

 29.8 pounds of reverted phosphoric acid 

 28.2 pounds of insoluble phosphoric acid 

 86.4 pounds of nitrogen 

 83 pounds of potassium oxide 



IVr cent. 



12.72 

 39.59 

 60.41 

 8.50 

 5.60 

 1.49 

 1.41 

 4.32 

 4.15 

 1.23 



$14 00 



2 68 



1 69 



20 74 



4 15 



$43 26 



Bradley's XL Superphosphate of Lime. 

 (Collected of Mes.irs. George Kobinson & Brooks, Palmer, Mass. 



^loisture 



Organic and volatile matter 



Ash constituents 



Total phosphoric acid 



Soluble phosphoric acid . 



Insoluble phosphoric acid 



Nitrogen 



Potassium oxide 



Insoluble matter 



) 



Pel- cent. 



17.10 



57.68 



42.32 



13.32 



9.30 



2.00 



2.93 



1.73 



3 20 



