COMMERCIAL FERTILIZERS. 



509 



Valuation per two thousand pounds : — 



158.6 pounds of soluble lAosphoric acid, 

 31.8 pounds of reverted phosphoric acid, 

 50.8 pounds of insoluble phosphoric acid, 

 86.6 pounds of iiotassium oxide, . 

 46.4 pounds of nitrogen, 



$12 69 

 2 39 



1 52 



2 01 

 8 12 



$26 73 



Darling's Ground Bone. 

 (Collected of J. H. Fairbanks, Fitchburg, Mass.) 



Guaranteed composition : Total phosphoric acid, 22 to 25 

 per cent. ; nitrogen, 3.5 to 4.5 per cent, (equivalent to 

 ammonia, 4 to 5 per cent.). 



Per cent. 



Moisture at 100° C, . . ' 7.61 



Total phosphoric acid, 21.50 



Soluble phosphoric acid, .37 



Reverted phosphoric acid, 7.25 



Insoluble phosphoric acid, 13.88 



Nitrogen, 3.64 



Insoluble matter, 1.60 



Valuation per two thousand pounds : 



7.4 pounds of soluble phosphoric acid, 

 145.0 pounds of reverted phosphoric acid, 

 277.6 pounds of insoluble j)hosphoric acid, 

 72.8 poiinds of nitrogen, 



fO 59 



10 88 

 13 88 



11 65 



$37 00 



N. Ward & Co.'s High Grade Animal Fertilizer. 

 (Collected of N. Ward & Co., Boston, Mass.) 



Guaranteed composition ; Available phosphoric acid, 12 

 to 14 per cent. ; nitrogen, 2.88 to 3.70 per cent, (equiva- 

 lent to ammonia, 3.5 to 4.5 per cent.) ; potassium oxide, 4 

 to 5 per cent. 



Moistiu-e at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, . . , 

 Insoluble matter, . 



Per cent. 



15.43 



12.63 



5.82 



6.60 



1.21 



4.46 



3.58 



.89 



