536 



BO.iRD OF AGRICULTURE. 



Economic Fertilizer, No. 1, for Grass. 

 (Collected of W. S. Butler & Co., BostoD, Mass.) 



Label lost ; no guaranty obtained. 



Per cent. 



Moisture at 100° C, 11.66 



Total phosphoric acid, 6.64 



Soluble i^hosphoric acid, .15 



Reverted phosphoric acid, ... . . 1.06 



Insoluble ijhosphoric acid, 5.4:3 



Potassium oxide 33 



Nitrogen, 1.34 



Insoluble matter, 6.38 



Valuation per two thousand pounds : 



3.0 pounds of soluble phosphoric acid, 

 21.2 pounds of reverted phosphoric acid, 

 108.6 pounds of insoluble phosphoric acid, 

 6.6 pounds of j)otassium oxide, . 

 26.8 jjounds of nitrogen (in nitrates), . 



$0 24 

 1 59 



3 26 



28 



4 29 



$9 66 



Economic Fertilizer, No. 7, for General Purposes. 

 (Butler, Breed & Co., Boston ; collected of Butler & Co., Boston, Mass.) 



Guaranteed composition : Total phosphoric acid, 8 to 12.5 

 per cent. ; nitrogen, 2.5 per cent. ; alkalies, 8 to 12.5 per 

 cent. 



Moisture at 100° C, 

 Total phosi^horic add, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Pep cent. 



7.00 



13.37 



none. 



.27 



13.10 



none. 



1.84 



8.20 



Valuation per two thousand pounds : 



5.4 pounds of reverted phosphoric acid, 

 262.0 pounds of insoluble phosphoric acid, 

 36.8 pounds of nitrogen. 



$0 41 

 7 86 

 6 44 



$14 71 



