242 



BOARD OF AGRICULTURE. 



Valuation per two thousand pounds ; - 



127.8 pounds of soluble phosphoric acid, 



1.4 pounds of reverted phosphoric acid, 

 38.4 pounds of insoluble phosphoric acid, 

 46. pounds of potassium oxide, . 

 15.2 pounds of nitrogen (organic matter), 

 22.8 pounds of nitrogen (ammonia salts), 

 5.8 pounds of nitrogen (nitrates). 



129 01 



APPENDIX. 



COMPOSITION OF SOME. COMPOUNDS IN FERTILIZERS. 



One hundreci parts of: — 



Nitric acid contain 26 parts of nitrogen. 



Ammonia contain 83.35 parts of nitrogen. 



Pure nitrate of potassa (saltpetre) contain 53.4 parts of nitric 

 acid and 46.6 parts of potassium oxide. 



Pure nitrate of soda (Chili saltpetre) contain 63.25 parts of nitric 

 acid. 



Choloride "of potassium contain 52.4 parts of potassium, 63.1 parts 

 o'f potassium oxide, and 47.6 parts of chlorine. 



Pure sulphate of potassa contain 54.9 parts of potassium oxide 

 and 46 parts of sulphuric acid. 



Bone phosphate (tricalcic phosj)hate) contain 46 parts of phos- 

 phoric acid and 54 parts of calcium oxide (lime). 



Calcined gypsum contain 41 parts of calcium oxide and 59 parts 

 of sulphuric acid. 



Uncalcined pure gypsum contain 32.5 parts of calcium oxide, 46.5 

 parts of sulphuric acid, and 21 parts of water. 



Carbonate of lime contain 56 parts of calcium oxide and 44 parts 

 of carbonic acid. 



Sulphate of magnesia (free of water) contain 33.3 parts of mag- 

 nesium oxide (magnesia) and 66.6 parts of sulphuric acid. 



C. A. GOESSMANN. 



Amherst, Jan. 26, 1884. 



