380 BOAED OF AGRICULTURE. 



Valuation per ton of two thonsand pounds : - 



101.0 pounds of soluble phosphoric acid, . 

 29.8 pounds of reverted phosphoric acid, 

 21.6 pounds of insoluble phosphoric acid, 

 74.6 pounds of nitrogen, .... 



115.6 pounds of potassium oxide. 



$40 28 



Potato Fertilizer. 



(Mapes Complete Fertilizer Co.; collected of Messrs. Newton & Fuller, Springfield, Masa.) 



Moisture, .... 

 Organic and volatile matter, 

 Ash constituents. 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Nitrogen, .... 

 Potassium oxide, 

 Insoluble matter, 



Per cent. 



11.63 

 57.74 

 42.26 

 8.38 

 2.59 

 2.80 

 2.99 

 3.12 

 5.45 

 4.74 



Valuation per ton of two thousand pounds : — 



51.8 pounds of soluble phosphoric acid, . 

 56.0 pounds of reverted phosphoric acid, 

 59.8 pounds of insoluble phosphoric acid, 

 62.4 pounds of nitrogen, .... 

 109.0 pounds of potassium oxide, 



$6 48 

 5 04 

 3 59 



14 97 

 5 45 



$35 53 



The Standard Superphosphate. 



(Collected of Messrs. Whitteraore Bros., Boston, Mass.) 



Moisture, .... 

 Organic and volatile matter, 

 Ash constituents. 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, .... 

 Potassium oxide, 

 Insoluble matter, 

 Magnesium oxide, 



Per cent. 



22.48 



41.10 



58.90 



10.72 



6.27 



2.18 



2.27 



2.64 



2.09 



7.41 



1.58 



