546 



BOARD OF AGRICULTURE. 



Darling's Animal Fertilizer. 

 (Collected of C. H. Thompson & Co., Boston, Mass.) 



Guaranteed composition: Total phosphoric acid, 10 to 12 

 per cent. ; potassium oxide, 4 to 6 per cent. ; nitrogen, 3.3 

 to 5 per cent, (equivalent to ammonia, 4 to 6 per cent.). 



Moisture at 100° C, 

 Total pliosiihoric acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



rer cent. 



13.47 

 13.51 

 2.02 

 5.23 

 8.28 

 4.97 

 3.29 

 3.53 



Valuation per two thousand pounds : — 



40.4 pounds of soluble phosphoric acid, 

 104.6 pounds of reverted jshosphoric acid, 

 165.6 pounds of insoluble phosphoric acid, 



99.4 pounds of potassium oxide, . 



65.8 pounds of nitrogen, 



$31 79 



C A. BartleWs Bone. 

 (Collected of C. A. Bartlett, at works, Worcester, Mass.) 



No guaranty obtained. 



rer cent. 



Moisture at 100° C, 5.13 



Total phosphoric acid, 24.67 



Soluble phosphoric acid, .28 



Reverted phosphoric acid, 5.48 



Insoluble phosi^horic acid, 18.91 



Nitrogen, 3.43 



Insoluble matter, .56 



Valuation per two thousand pounds : — 



5.6 pounds of soluble phosphoric acid, 

 109.6 pounds of reverted phosphoric acid, 

 378. 2 poimds of insoluble phosphoric acid, . 

 68.6 pounds of nitrogen, .... 



$0 45 



8 22 



18 91 



10 29 



$37 87 



