COMMERCIAL FERTILIZERS. 



229 



Slockbridge Manures, Grain. 

 (Collected of J. and J. A. Rice, Worcester, Mass.) 



Giiarantecd composition: total phosplioiic acid, 7 to 9 

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

 6 to 7 per cent. ; potassium oxide, 4 to 5 per cent. ; nitro- 

 gen, 3.25 to 4.25 per cent. 



Per cent. 



Valuation per two thousand pounds : — 



58.2 pounds of soluble pliosphorio acid, 

 42.8 pounds of reverted phosphoric acid, 

 74. pounds of insoluble phosphoric acid, 

 10G.6 pounds of potassium oxide, . 

 71.4 pounds of nitrogen (in organic matter), 

 25.4 pounds of nitrogen (in nitrates), . 



$40 29 



Bracllcifs XL Ammoniated Bone Superphosphate. 

 (Collected of J. and J. A. Rice, Worcester, Mass.) 



Guaranteed composition : soluble phosphoric acid, 7 to 8 

 per cent. ; revetted phosphoric acid, 2 to 3 per cent. ; insol- 

 uble phosphoric acid, 2 to 3 per cent. ; potassium oxide, 2 

 to 3 per cent. ; nitrogen, 2.5 to 3.5 per cent. 



Moisture at 100° C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 ReverttMl phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, .... 

 Insoluble matter, 



Per cent. 

 17.50 

 1240 

 6.81 

 3.04 

 2.55 

 1.92 

 2.65 

 4.23 



