COMMERCIAL FERTILIZERS. 



297 



insoluble phosphoric acid, 

 Potassium oxide, 

 Insoluble matter, 



Per cent. 

 4.18 

 4.16 

 2.32 



Valuation per two thousand pounds : 



62.6 pounds of available phosphoric acid, 

 83.6 pounds of insoluble phosphoric acid, 

 83.2 pounds of potassium oxide, 

 85.2 pounds of nitrogen, 



Quinnipiac Fish and Potash. 

 (Collected of D. A. Horton, Northampton, Mass.) 



$29 97 



Guaranteed composition : Total phosphoric acid, 5 to 7 

 per cent. : soluble and reverted phosphoric acid, 3 to 4 per 

 cent. ; nitrogen, 3|^ to 4^ per cent, (equivalent to ammonia, 

 4 to 5 per cent.) ; potassium oxide, 3 to 5 per cent. 



Moisture at 100° C, 

 Total phosphoric acid, 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Nitrogen, .... 

 Potassium oxide, 

 Insoluble matter, 



Per cent. 



20.30 

 8.12 



.96 

 4.08 

 3.08 

 4.10 

 4.78 



.56 



Valuation per two thousand pounds 



19.2 pounds of soluble phosphoric acid, 

 81.6 pounds of reverted phosphoric acid, 

 61.6 pounds of insoluble phosphoric acid, 

 82. pounds of nitrogen, 

 95.6 pounds of potassium oxide. 



Chittenden's Fish and Potash. 



$1 92 

 7 34 

 2 77 



16 40 

 4 06 



$32 49 



(National Fertilizer Co., Bridgeport, Conu. ; collected of J. A. Sullivan, North- 

 ampton, Mass.) 



Guaranteed composition : Total phosphoric acid, 6 to 8 

 per cent. ; potassium oxide, 4 to 6 per cent. ; ammonia, 3 

 to 5 per cent, (equivalent to nitrogen, 2.5 to 4 per cent.). 



