COMMERCIAL FERTILIZERS. 



311 



Valuation per two thousand pounds : — 



113.4 pounds of soluble phosphoric acid, 

 90. pounds of reverted phosphoric acid, 

 61.G pounds of insoluble phosphoric acid, 

 44.4 pounds of nitrogen, 

 61.6 pounds of potassium oxide, 



$11 34 

 8 10 

 2 77 

 8 88 

 2 19 



$33 28 

 Sjiarrow'^s Grass Fertilizer. 



(Judson & Sparrow, Boston, Mass.; collected of Everett & Gleason, Boston, Mass.) 



Guaranteed composition : Ammonia, 5 to 6 per cent, 

 (equivalent to nitrogen, 4 to 5 per cent.) ; soluble and re- 

 verted phosphoric acid (available), 8 to 9 per cent. ; potas- 

 sium oxide, 4 to 5 per cent. 



Moisture at 100° C, 

 Total phosphoric acid. 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide. 

 Nitrogen (in ammonia salts), 

 Nitrogen (in organic matter). 



Valuation per two thousand pounds : — 



153.6 pounds of soluble phosphoric acid, 

 42. pounds of reverted phosphoric acid, 

 13.6 pounds of insoluble phosphoric acid, 

 90.4 pounds of potassium oxide, 

 63. pounds of nitrogen (in ammonia salts), 

 31.2 pounds of nitrogen (in organic matter), 



$43 69 

 Pacific Island Phosphate. 

 (Pacific Guano Co., New York ; collected at railroad depot, South Deerfield, Mass.) 



Guaranteed composition : Ammonia, 1 to 2 per cent, 

 (equivalent to nitrogen, .8 to 1.6 per cent.); bone phos- 

 phate, 26 to 30 per cent. ; sulphate of potash, 12 to 15 per 

 cent, (equal to potassium oxide, 6.49 to 8.12 per cent.) 



Per cent. 



