236 



BOARD OF AGRICULTUKE. 



Insoluble phosphoric acid, .... 



Potassium oxide, 



Nitrogen (in organic mattei'), . 



Nitrogen (in ammonia salts), . . . . 



Valuation per two thousand pounds : — 



84.6 pounds of soluble phosphoric acid, 

 32.2 pounds of reverted phosphoric acid, 

 29.4 pounds of insoluble phosphoric acid, 

 193.6 pounds of potassium oxide, . 

 33.4 pounds of nitrogen (in organic matter), 

 46. pounds of nitrogen (in ammonia salts). 



Per cent. 

 1.47 

 9.68 

 1.67 

 2.30 



$9 31 

 2 58 

 1 76 

 8 23 

 7 68 



11 96 



$41 52 



The Low] Island Ammoniated Superphosphate ivi'Ji Potash. 



(Atlantic and Virginia Fertilizer Co. ; collected of Fuller and Newton, Springfield, 



Mass.) 



Guaranteed composition : soluble and reverted phosphoric 

 acid (available), 8 to 11 per cent.; insoluble phosphoric 

 acid, 2 to 3 per cent. ; potassium oxide, 5 to 7 per cent. ; 

 ammonia, 1 to 2.5 per cent, (equivalent to nitrogen, .8 to 

 2.1 per cent.). 



Moisture at 100" C, . 

 Total phosphoric acid. 

 Soluble phosphoric acid, . 

 Reverted phosphoric acid, 

 Insoluble phosphoric acid, 

 Potassium oxide. 

 Nitrogen, .... 



Per cent. 

 20.15 

 12 63 

 6.01 

 1.82 

 4.80 

 4 70 

 1.95 



Valuation per two thousand pounds : 



120.2 pounds of soluble phosphoric .acid, 

 36.4 pounds of reverted phosphoric acid, 

 96. pound.s of insoluble phosphoric acid, 

 94. pounils of potassium oxide, . 

 39. pouuds of nitrogen. 



$13 22 

 2 91 

 5 76 



4 01) 

 8 97 



$34 86 

 Soluble Pacific Ouano. 

 (Collected of Parker and Gannct, Springfield, Mass.) 



Guaranteed composition : soluble phosphoric acid. 6.5 to 

 8 per cent. ; reverted phosphoric acid, 1.5 to 3 per cent. ; 

 insoluble phosphoric acid, 2 to 4 per cent. ; potassium oxide, 

 2 to 3.5 per cent. ; nitrogen, 2 to 3 per cent. 



