COMMERCIAL FERTILIZERS. 



349 



Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Nitrogen 

 Potassium oxide 

 Insoluble matter 



Valuation per ton of two thousand pounds 



80.6 pounds of soluble phosphoric acid . 



27.6 pounds of reverted phosphoric acid 

 161.8 pounds of insoluble phosphoric acid 

 141.6 pounds of nitrogen 



49.4 pounds of potassium oxide . 



Ammonia-ted Superphosphates. 



Per cent. 



13.500 

 4.030 

 1.380 

 8.090 

 7.082 

 2.470 



10.700 



$58 32 



Soluble Pacific Guano. 

 (CoUecU-.l of Charles E. Wilder, Worcester. Mass.) 



Moisture at 100° C. 

 Organic and volatile matter 

 Ash constituents . 

 Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Nitrogen 

 Potassium oxide 

 Insoluble matter 



Val nation per ton of two thousand pounds 



148.4 pounds of soluble phosphoric acid . 

 13.8 pounds of reverted phosphoric acid 

 70 pounds of insoluble phosphoric acid 

 G1.6 pounds of nitrogen .... 



50 pounds of potassium o.xide . . » 



Slanilard Superphosphate. 

 (Culkctid of Whitlcmore l^rothcrs, Boston, Mass.) 



Moisture 100° - 105° C 



Volatile and organic matter ..... 

 Ash constituents ....... 



641 63 



IVr cent. 



20.91 

 45.80 

 54.20 



