COMMERCIAL FERTILIZERS. 



297 



Insoluble phosphoric acid, 

 Potassium oxjde, 

 Insoluble matter, 



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, 



Per cent. 



4.18 

 4.16 

 2.32 



^29 97 



Quinnijnac Fish and Potash. 

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



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. 



Per cent. 



20.30 

 8.12 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Nitrogen, .... 

 Potassium oxide. 

 Insoluble matter. 



.96 

 4.08 

 3.08 

 4.10 

 4.78 



.56 



Valuation per two thousand potmds : — 



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. 



$32 49 



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

 ampton, Mass.) 



Guaranteed composition : Total phosphoric acid, G 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.). 



