COMMERCIAL FERTILIZERS. 



317 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, 

 Nitrogen, 

 Insoluble matter, 



Per cent, 

 13.38 

 14.37 

 4.99 

 7.26 

 2.12 

 1.04 

 8.30 

 1.10 



Valuation per two thousand pounds : — 



99.8 pounds of soluble phosphoric acid, 

 145.2 pounds of reverted phosphoric acid, 

 42.4 pounds of insoluble phosphoric acid, 

 20.8 pounds of potassium oxide, . 

 66. pounds of nitrogen. 



Tobacco Fertilizer . 



$9 98 



13 07 



1 91 



88 



13 20 



$39 01 



(B. Randall, Boston, Mass.; collected of H. C. Haskell, Deerfield, Mass.) 



Guaranteed composition : Moisture, 10 to 14 per cent. ; 

 soluble phosphoric acid, 7 to 8 per cent. ; reverted phos- 

 phoric acid, 1 to 2 per cent. ; insoluble phosphoric acid, 4 

 to 5 per cent. ; ammonia, 3| to 4| per cent, (equivalent to 

 nitrogen, 2.9 to 3.7 per cent.) ; potassium oxide, 4 to 5 per 

 cent. 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid; 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen (in ammonia salts), 

 Nitrogen (in nitrates), . 

 Nitrogen (in organic matter) , 

 Insoluble matter. 



Per cent. 



12.50 



11.08 



9.21 



.57 



1.30 



2.78 



.22 



.44 



2.83 



.90 



Valuation per two thousand pounds : — 



184.2 pounds of soluble phosphoric acid, 

 11.4 pounds of reverted phosphoric acid, 

 26. pounds of insoluble phosphoric acid, . 

 4.4 pounds of nitrogen (in ammonia salts). 



f 18 42 



1 03 



1 17 



97 



