212 



BOARD OF AGRICULTURE. 



3 to 4 per cent, (equivalent to nitrogen, 2.5 to 3.3 per 

 cent.). 



Moisture at 100° C, . 

 Total phosphoric acid, 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide, 

 Nitrogen, .... 

 Insoluble matter. 



Valuation per two thousand pounds : - 



232. pounds of soluble phosphoric acid, 

 4.4 pounds ol reverted phosphoric acid, 

 4.8 pounds of insoluble phosphoric acid, 



77.8 pounds of potassium oxide, . 



67.8 pounds of nitrogen, 



Per cent. 



14.75 



12.06 



ll.GO 



.22 



.24 



3 8» 



3.39 



.65 



$45 06 



Darling''s Lawn Dresser. 

 (Collected of Parker and Gannet, Boston, Mass.) 



Guaranteed composition : total phosphoric acid, 10 to 



13 per cent. ; potassium oxide, 5 to 6 per cent, ; ammonia, 



5 to 7 per cent, (equivalent to nitrogen, 4.1 to 5.7 per 



cent.). 



Per cent. 

 Moisture at 100° C, ' . . . 9 43 



Total phosphoric acid, 

 Soluble phosj^horic acid, . 

 Reverted 2)hosphoric acid. 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, .... 

 Insoluble matter, 



Valuation per two thousand pounds : 



11.6 pounds of soluble phosphoric acid, 

 48. pounds of reverted phosphoric acid, 

 157. pounds of insoluble phosphoric acid, 

 122.8 pounds of potassium oxide, . 

 89.4 pounds of nitrogen, . , 



10.83 

 .58 

 2.40 

 7.85 

 6.14 

 4.47 

 1.18 



$40 32 



