COMMERCIAL FERTILIZERS. 



371 



Valuation per two thousand pounds : 



19n.6 pounds of soluble phosphoric acid, 

 35.8 pounds of reverted jihosphoric acid, 

 30.8 pounds of insoluble phosphoric acid, 

 17. pounds of potassium oxide, . 

 68 6 pounds of nitrogen, 



$31 24 

 Stockbridge's Manures. {Corn and Grain.) 

 (Collected of A. B. Lawrence, Fitchbnrg, Mass.) 



Guaranteed composition : Total phosphoric acid, 7 to 9 

 per cent. ; available phosphoric acid, 6 to 7 per cent. ; po 

 tassiura oxide, 4 to 5 per cent. ; nitrogen, 3^ to 4^ per cent, 

 (equivalent to ammonia, 4 to 5 per cent.). 



Moisture at 10i.° C , 

 Total phosphoric acid, . 

 Soluble phosphoric acid. 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Per cent. 



12.30 

 11.63 

 7.20 

 2.91 

 1.51 

 3.43 

 4.04 

 2.96 



Valuation per two thousand pounds : 



144. pounds of soluble phosphoric acid. 

 58.2 pounds of reverted phosphoric acid, 

 30.2 pounds of insoluble phosphoric acid, 

 68.6 pounds of potassium oxide, . 

 80 8 pounds of nitrogen. 



Mayo's Acme Superphosphate. 



$33 46 



(Atlantic Fertilizer Company, Boston, Mass.; collected of Sprague & Williams 

 South Framingham, Mass.) 



Guaranteed composition : Soluble phosphoric acid, 9 to 11 

 per cent. ; available phosphoric acid, 10| to 11^ per cent. ; 

 insoluble phosphoric acid, 1 to 2 per cent. ; potassium oxide, 

 2| to 3^ per cent. ; nitrogen. 2 to 2^ per cent, (equivalent 

 to ammonia, 2| to 3i per cent.). 



I'er cent. 



17.31 



]\Ioisture at 100° C , 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted jjhosphoric acid. 



13 26 

 8.06 

 2.51 



