364 



BOARD OF AGRICULTURE. 



Moisture at 100° C, 

 Total phosphoiic acid, . 

 Soluble phosphoric acid, 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds ; 



25.6 pounds of soluble phosi^horic acid, 

 39.2 pounds of reverted phosphoric acid, 

 9.6 poimds of insoluble phosphoric acid, 

 49.8 pounds of potassium oxide, . 

 84 6 pounds of nitrogen, 



George W. Miles' IXL Ammoniated Bone Superphosphate. 



(Collected of B. F. Bridges, Jr., South Deerfield, Mass.) 



Guaranteed composition : Available piiosphoric acid, 8 to 



12 per cent. ; insoluble phosphoric acid, 1 to 3 per cent. ; 



potassium sulphate, 1 to 3 per cent. ; ammonia, 2^ to 4 per 



cent, (equivalent to nitrogen, 2 to 3.3 per cent.). 



Per cent. 



Moisture at 100^ C, 17.80 



Total phosphoric acid, . 

 Soluble phosi^horic acid, 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide, . 

 Nitrogen, 

 Insoluble matter, . 



Valuation per two thousand pounds : 



129.2 pounds of soluble phosphoric acid, 

 85.6 pounds of reverted phosphoric acid, 

 23.4 pounds of insoluble phosphoric acid, 

 19.6 pounds of potassium oxide, . 

 44.2 pounds of niti'ogen. 



$26 05 



Dole's Fertilizer 203. 

 (Collected of B. F. Bridges, Jr., South Deerfield, Mass.) 



Guaranteed composition: Total phosphoric acid, 10 to 12 

 per cent. ; soluble and reverted phosphoric acid, 3 to 10 per 

 cent. ; potassium sulphate, 3 to 4 per cent. ; nitrogen, 3 to 

 4 per cent, (equivalent to ammonia, 3^ to 4^ per cent.). 



