COMMERCIAL FERTILIZERS. 



235 



Valuation per two thousand pounds : 



168.8 pounds of soluble phosphoric acid, 

 13.2 pounds of reverted phosphoric acid, 

 42.8 pounds of insoluble phosphoric acid, 

 47, pounds of potassium oxide, . 

 76.8 pounds of nitrogen. 



Ul 86 



Stockhridge Manures, Potato. 

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



Guaranteed composition: total phosphoric acid, 8 to 10 

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

 7 to 8 per cent. ; potassium oxide (as sulphate), 5 to 6 per 

 cent. ; nitrogen, 3.25 to 4.25 per cent. 



Moisture at 100° C, . 

 Total pliosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen, .... 



Valuation per two thousand pounds ; - 



112.6 pounds of soluble phosphoric acid, 

 11. pounds of reverted phosphoric acid, 

 48.8 pounds of insoluble phosphoric acid, 

 85.2 pounds of potassium oxide, . 

 81.8 pounds of nitrogen. 



Per cent. 

 14.15 



8.62 

 5.63 

 .55 

 2.44 

 4.26 

 4.09 



?40 97 



H. J. Baker and Bros.'' Potato Fertilizer. 

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



Guaranteed composition : soltible and reverted phosphoric 

 acid (available), 5.25 per cent.; potassium oxide, 10 per 

 cent. ; ammonia, 4 per cent, (equivalent to nitrogen, 3.3 

 per cent.). 



Per cent. 



Moisture at lOO'^ C , 13.65 



Total phosphoric acid, 7.31 



Soluble phosphoric acid, 4.28 



Reverted phosphoric acid, 1.61 



