COMMERCIAL FERTILIZERS. 



377 



Soluble Pacific Guano. 



(Collected of T. Clark & Son, Worcester, 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. 



Per cent. 



14.95 



44.26 



55.74 



10.30 



7.36 



.32 



2.62 



2.65 



3.81 



5.78 



Valuation per ton of two thousand pounds 



147.2 pounds of soluble phosphoric acid, 

 6.4 pounds of reverted phosphoric acid, 

 62.4 pounds of insoluble phosphoric acid, 

 53.0 pounds of nitrogen, 

 76.2 pounds of potassium oxide, 



$39 25 



MiichelVs Standard Superphosphate. 



(Collected of Messrs. Rice Brothers, Worcester, Mass.) 



Moisture, .... 

 Organic and volatile matter. 

 Ash constituents. 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Nitrogen, .... 

 Totassium oxide. 

 Insoluble matter, 



Per cent. 



33.42 



66.96 



33.04 



7.41 



5.14 



1.49 



.78 



1.61 



1.87 



1.83 



Valuation per ton of two thousand pounds : — 



102.8 pounds of soluble phosphoric acid, . . . $12 85 



29.8 pounds of reverted phosphoric acid, . . . 2 68 

 15.6 pounds of insoluble phosphoric acid, ... 94 



- 32.2 pounds of nitrogen, 7 72 



37.4 pounds of potassium oxide, 1 87 



26 06 



