COMMERCIAL FERTILIZERS. 



507 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



10.45 

 13.38 

 5.67 

 3.47 

 4.34 

 7.07 

 3.77 

 .95 



Valuation per two thousand pounds : — 



111.4 pounds of soluble phosphoric acid, 

 69.4 pounds of reverted phosphoric acid, 

 86.8 pounds of insoluble phosphoric acid, 



141.4 pounds of jjotassium oxide, . 

 75.4 pounds of nitrogen, 



$37 70 



Mapes' Corn Manure. 

 (Collected of Peckham & Ross, Worcester, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent, (nearly all soluble and available) ; potassium oxide 

 (sulphate), 6 to 8 per cent.; ammonia, 4.5 to 5 percent, 

 (equivalent to nitrogen, 3.7 to 4.1 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



11.05 

 12.47 

 2.98 

 5.73 

 3.76 

 6.92 

 3.83 

 1.10 



Valuation per two thousand pounds : — 



59.6 pounds of soluble phosphoric acid, 

 114.6 poimds of reverted phosphoric acid, 



75.2 pounds of insoluble phosphoric acid, 

 138.4 pounds of j^otassium oxide, . 



76.6 pounds of nitrogen, 



$4 77 

 8 60 

 2 26 

 7 61 



13 41 



$36 65 



