AMMONIATED SUPERPHOSPHATES. 323 



Total phosphoric acid 

 Soluble phosphoric 

 Reverted phosphoric acid 

 Insoluble phosphoric acid 

 Potassium oxide 

 Insoluble matter 



Per cent. 



10.32 



8.40 



.70 



1.22 



1.88 

 2.30 



Valuation per ton of two thousand pounds : — 



71.6 pounds of nitrogen 

 168.0 pounds of soluble phosphoric acid 

 14.0 pounds of reverted phosphoric acid 

 24.4 pounds of insoluble phosphoric acid 

 37.6 pounds of potassium oxide 



II. 



$38 70 



Valuation per ton of two thousand pounds : — 



146.2 pounds of nitrogen 

 145.0 pounds of potassium oxide 

 117.6 pounds of soluble phosphoric acid 

 11.8 pounds of reverted phosphoric acid 

 15.8 pounds of insoluble phosphoric acid 



III. 



German Plant-Food. 



(Charles W. Guy 



Moisture at 100° C. 

 Total nitrogen 

 Total phosphoric acid 

 Soluble phosphoric acid . 

 Reverted phosphoric acid 



Boston, Mass.) 



$51 16 



Per cent. 



5.50 

 3.13 

 11.10 

 7.39 

 3.11 



