COMMERCIAL FERTILIZERS. 



521 



Valuation per two thousand pounds : 



184.8 pounds of soluble i^hosphoric acid, 

 26.4 pounds of reverted phosphoric acid, 

 5.0 pounds of insoluble phosphoric acid, 

 41.6 pounds of potassium oxide, . 

 80.0 pounds of nitrogen, 



|32 69 



Bradley's Potato Manure. 

 (Collected of G. W. Atkinson, Reading, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 5 to 6 

 per cent. ; reverted phosphoric acid, 1 to 2 per cent. ; in- 

 soluble phosphoric acid, 2 to 3 per cent. ; potassium oxide, 

 6 to 8 per cent, (equivalent to potassium sulphate, 11 to 

 13 per cent.) ; nitrogen, 2.68 to 3.50 per cent, (equivalent 

 to ammonia, 3^ to 4^ per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble i^hosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



110.6 pounds of soluble phosphoric acid, 

 27.6 pounds of reverted phosphoric acid, 

 61.6 povmds of insoluble jjhosphoric acid, 



126.0 ijounds of potassium oxide, . 

 65.2 pounds of nitrogen, 



Per cent. 



12.25 

 9.99 

 5.53 

 1.38 

 3.08 

 6.30 

 3.26 

 4.60 



f31 11 



Dole's Fertilizer, No. 203. 

 (Collected of M. A. Stone, Reading, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; available phosphoric acid, 8 to 10 per cent. ; 

 potassium oxide, 3 to 4 per cent. ; nitrogen, 3 to 4 per 

 cent, (equivalent to ammonia, 3.5 to 4.5 per cent.). 



