548 



BOARD OF AGRICULTURE. 



Darling's Animal Fertilizer. 

 (Collected of Parker & Wood, Boston, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; potassium oxide, 4 to 6 per cent. ; ammonia, 

 4 to G per cent, (equivalent to nitrogen, 3.3 to 5 percent.). 



Moisture at 100" C, 

 Total phosphoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosi:)horic acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : 



91.4 pounds of soluble phosphoi'ic acid, 

 4G.0 pounds of reverted phosphoric acid, 

 70. G pounds of insoluble phosphoric acid, 

 82.8 pounds of potassium oxide, . 

 72.8 pounds of nitrogen, 



Per cont. 



14.92 

 10.70 

 4..'')7 

 2.30 

 3.83 

 4.14 

 3.G4 

 1.36 



$7 31 

 3 45 



2 30 



3 52 

 12 74 



$29 32 



Darling's Laion Dressing. 

 (Collected of Parker & Wood, Boston, Mass.) 



Guaranteed composition : Total phosphoric acid, 10 to 12 

 per cent. ; potassium oxide, 5 to G per cent. ; ammonia, 

 5 to 7 per cent, (equivalent to nitrogen, 4.1 to 5. G per cent.). 



Moi.sturo at 100° C, 

 Total phosphoric acid, . 

 Soluble phosjihoric acid, 

 Revcrtcil phosphoric acid. 

 Insoluble phosphoric acid. 

 Potassium oxide, , 

 Nitrogen, .... 

 Insoluble matter, . 



Valuation per two thousand pounds : — 



70.8 pounds of soluble phosplioric acid, . 



G9.1 pounds of reverted phosplioric acid, . 

 1IG.2 pounds of insoluble phosplioric acid, 

 102.2 pounds of iiotassium oxide, 



89.2 i^ounds of nitrogen, .... 



Per cent. 



12.G0 

 12.82 

 3.54 

 3.47 

 5.81 

 5.11 

 4. 40 

 2.12 



?5 C6 

 5 21 



3 49 



4 34 

 !.■> CI 



$34 31 



