COMMERCIAL FERTILIZERS. 



341 



Valuation per two thousand pounds : — 



160. pounds of soluble ])hosphovlc acid, 

 6Q6 pounds of reverted phosphoric acid, 

 50.2 pounds of insoluble phosphoric acid, . 

 69.4 pounds of nitrogen, .... 



$31 11 

 Bradley's XL Superphosphate. 

 (Collected of D. J. Wright, Northampton, Mass ) 



Guaranteed composition : Total phosphoric acid, 11 to 14 

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

 verted phosphoric acid, 2 to 3 per cent. ; available phospho- 

 ric acid, 9 to 11 per cent. ; potassium oxide, 2 to 3 per 

 cent, (equivalent to potassium sulphate, 3.77 to 5.55 per 

 cent.) ; nitrogen, 2.5 to 3.25 per cent, (equivalent to am- 

 monia, 3 to 4 per cent.). 



Per cent. 



13 80 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoi'ic acid, 

 Potassium oxide, . 

 Niti'ogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



162 2 pounds of sokible phosphoric acid, 

 18.8 pounds of reverted phosjihoric acid, 

 67. pounds of insoluble phosjihoric acid, 

 57.2 pounds of potassium oxide, . 

 55.4 poimds of nitrogen, 



12.45 

 8.16 

 .94 

 3.35 

 2.86 

 2.77 

 6 15 



$13 06 



1 41 



2 01 



3 15 

 9 42 



$29 05 



Williams, Clark & Co.'s ^'■jhnericus" for Potatoes. 

 (Collected of John Sullivan, Northampton, Mass.) 



Guaranteed composition : Total phosphoric acid, 7 to 10 

 per cent. ; soluble phosphoric acid, 5 to per cent. ; re- 

 verted phosphoric acid, 1 to 2 per cent. ; insoluble phospho- 

 ric acid, 1 to 2 per cent. ; potassium oxide, 8 to 10 per cent, 

 (equivalent to potassium sidphate, 15 to 18 per cent.) ; am- 

 monia, 4 to 5 per cent, (equivalent to nitrogen, 3.3 to 4.1 

 per cent.). 



