COI^IMERCIAL FEETILIZERS. 



305 



57.6 pounds of nitrogen (in organic naatter), 



7.4 pounds of nitrogen (in nitrates), . 

 48. pounds of potassium oxide, . 



$11 52 



1 33 



2 04 



$37 19 

 Williams, Clark & Co.''s " Americus " Ammoniated Bone Superphosphate. 

 (Collected of B. L. Bragg & Co. Springfield, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 13 

 per cent. ; soluble phosphoric acid, 6 to 8 per cent. ; re- 

 verted phosphoric acid, 3 to 4 per cent. ; insoluble phos- 

 phoric acid, 1 to 2 per cent. ; potassium oxide, 1 to 2 per 

 cent. ; ammonia, 2 to 3 per cent, (equivalent to nitrogen, 

 1.6 to 2.5 per cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, 

 Nitrogen (in organic matter), 

 Nitrogen (in nitrates), . 



Valuation per two thousand pounds : — 



132.4 pounds of soluble phosphoric acid, 

 60. pounds of reverted phosphoric acid, 

 43.4 pounds of insoluble phosphoric acid, 

 37. pounds of potassium oxide, 

 64.6 pounds of nitrogen (in organic matter) , 

 4.6 pounds of nitrogen (in nitrates), . 



Per cent. 



17.37 

 11.79 

 6.62 

 3.00 

 2.17 

 1.85 

 2.73 

 .23 



$13 24 



5 40 



1 95 



1 57 



10 92 



83 



$33 91 

 E. Frank Coe''s Ammoniated Bone Superphosphate. 



(Collected of C. J. Othlck, Feeding Hills, Mass.) 

 Guaranteed composition : Soluble phosphoric acid, 9 to 12 

 per cent. ; insoluble phosphoric acid, 2 to 3 per cent. ; am- 

 monia, 2| to 3 per cent, (equivalent to nitrogen, 2 to 2.47 

 per cent.). 



Per cent. 



Moisture at 100° C, 12.76 



Total phosphoric acid, , . 11.60 



Soluble phosphoric acid, 4.51 



Reverted phosphoric acid, . . . . . . 2.91 



Insoluble phosphoric acid, 4.18 



Potassium oxide, 1.18 



Nitrogen (in organic matter), 2.14 



Insoluble matter, 5.78 



