COMMERCIAL FERTILIZERS. 



Valuation per two thousand pounds : — 



134.4 pounds of soluble phosphoric acid, 

 61.6 pounds of reverted iDhosplioric acid, 

 30.8 pounds of insoluble phosphoric acid, 

 83.6 pounds of potassium oxide, . 

 56.6 pounds of nitrogen, 



Church's " Fish and Potash." 



493 



|10 

 4 



3 

 9 



62 

 92 

 55 

 91 



$29 75 



(Collected of Wilder & Puffer, Springfield, Mass.) 



Guaranteed composition : Total phosphoric acid, 5 to 6 

 per cent. ; potassium sulphate, 5 to 6 per cent. ; ammonia, 

 4 to 5 per ceut. (equivalent to nitrogen, 3.3 to 4.1 per 

 cent.). 



Moisture at 100° C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



49. pounds of soluble phosphoric acid, 

 54.2 pounds of reverted phosphoric acid, 

 28.4 i)Ounds of insoluble phosphoric acid, 

 66.6 pounds of potassium oxide, . 

 84.6 pounds of nitrogen, 



Per cent. 



26.76 

 6.58 

 2.45 

 2.71 

 1.42 

 3.33 

 4.23 

 3.02 



$27 31 



II L. Phelps' " Complete Manure for Grass." 

 (Collected of Prentiss, Brooks & Co., Holyoke, Mass.) 



Guaranteed composition : Available phosphoric acid, 4 to 

 6 per cent. ; insoluble phosphoric acid, 2 to 3 per cent. ; 

 potassium oxide, 8 to 10 per cent. ; ammonia, 5 to 6 per 

 cent, (equivalent to nitrogen, 4.1 to 5 per cent.). 



