COMMERCIAL FEETILIZERS. 



209 



Russell Coe's Ammoniated Bone Superphosphate. 

 (Collected of Wm. H. Earle, Worcester, Mass.) 



Guaranteed composition : total phosphoric acid, 12 to 15 

 per cent. ; soluble and reverted phosphoric acid (available), 

 10 to 12 per cent. ; potassium oxide, 2.5 to 4 per cent. ; 

 nitrogen, 1.75 to 2.5 per cent. 



Moisture at 100 C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, 

 Nitrogen, .... 

 Insoluble matter, 



Per cent. 

 16.52 

 8.44 

 4 22 

 1.13 

 3.09 

 1.40 

 2.95 

 3.20 



Valuation per two thousand pounds : 



84 4 pounds of soluble phosphoric acid, . 

 22.6 pounds of reverted phosphoric acid, 

 61.8 pounds of insoluble phosphoric acid, 

 28. pounds of potassium oxide, 

 59. pounds of nitrogen, .... 



$29 56 



Stockbridge Manures, Grass Top Dressing. 

 (Collected of Breck and Son, Boston, Mass.) 



Guaranteed composition : total phosphoric acid, 6 to 8 

 per cent. ; soluble and reverted phosphoric acid (available), 

 5 to 6 per cent. ; potassium oxide, 4 to 5 per cent. ; nitro- 

 gen, 4.25 to 5 per cent., ammonia, 5 to 6 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), 

 Insoluble matter, 



Per cent. 

 18.25 

 8.32 

 5.56 

 .97 

 1.79 

 5.65 

 4.16 

 1.90 

 4.75 



