COMMERCIAL FERTILIZERS. 



237 



Moisture at 100° C, . . ' . 

 Total phosphoric acid, 

 Soluble pliosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide. 

 Nitrogen (in organic matter), , 

 Nitrogen (in nitrates), 

 Insoluble matter. 



Per cent. 



18 42 



11.74 



5.11 



1.15 



5 47 



2.05 



2C0 



.17 



5.90 



Valuation per two thousand pounds : — 



102.2 pounds of soluble phosphoric acid, 

 23. 1 ounds of reverted phosphoric acid, 



109.4 pounds of insoluble pliosphoric acid, 

 41. pounds of potassium oxide, . 

 52. pounds of nitrogen (in organic matter), 

 3.4 pounds of nitrogen (in nitrates), . 



fll 24 



1 84 



6 56 



1 74 



11 96 



08 



$34 02 



Mapes Tobacco Fertilizer. 

 (Collected of Fuller and Newton, Springfield, Mass.) 



Guaranteed composition : total phosphoric acid, 

 per cent. ; potassium oxide (in form of sulphate), 

 per cent. ; ammonia, 5.75 per cent, (equivalent to 

 4.73 per cent.). 



Moisture at 100° C, .... 



Total phosphoric acid, .... 

 Soluble phosphoric acid, .... 

 Reverted pliosphoric acid, 

 Insoluble phosphoric acid, 



Potassium oxide, 



Nitrogen (in organic matter). 

 Nitrogen (in ammonia salts), . 

 Nitrogen (in nitrates), .... 

 Insoluble matter, 



Valuation per two thousand pounds : — 



39. pounds of soluble phosphoric acid, 

 50. pounds of reverted phosphoric acid, 

 75.2 pounds of insoluble phosphoric acid, 

 147.2 pounds of potassium oxide, . 

 12. pounds of nitrogen (in organic matter), 

 48.6 pounds of nitrogen (in ammonia salts), 

 34. pounds of nitrogen (in nitrates), . 



7 to 7.5 

 7 to 7.50 

 nitrogen, 



Per cent. 

 15.18 

 8.21 

 1.95 

 2.50 

 3.76 

 7.36 

 .00 

 2.43 

 1.70 

 1.23 



$4 29 

 4 00 

 4 51 



10 30 

 2 76 



12 64 

 6 80 



$45 30 



