INTRINSIC VALUE OF FERTILIZERS. 



345 



57.8 pounds of insoluble phosphoric acid 

 43.4 pounds of potassium oxide 



XIX. 



Bradleifs XL Superphosphate. 

 (Messrs. Bagg & Batcheldcr, Springfield, Mass.) 



Per cent. 



3 47 

 1 97 



$39 61 



Valuation per ton of two thousand pounds : — 



47 pounds of nitrogen .... 



161.2 pounds of soluble phosphoric acid . 

 12 pounds of reverted phosphoric acid 

 69.8 pounds of insoluble phosphoric acid 



XX. 



Stockhridge^s Manures; Oats. 

 (Messrs. W. H. Bowker & Co., Boston, Mass.) 



834 82 



Valuation per ton of two thousand pounds : — 



108.2 pounds of nitrogen $21 64 



92.8 pounds of soluble phosphoric acid . • 11 60 



12.2 pomids of insoluble phosphoric acid . . 1 10 



124.8 pounds of potassium oxide . . . . 5 62 



44 $39 96 



