360 BOARD OF AGRICULTURE. 



II. 



Hampden County. 



Per cent. 



Moisture at 100°-105° C 75.03 



Organic and volatile matter .97.61 



Ash 2.39 



Nitrogen (in organic matter) 67 



in. 



Hampden County. 



Per cent. 



Moisture lost at 105° C 68.79 



Organic and volatile matter 84.17 



Ash 15.83 



Nitrogen (in organic matter) . . . . . . .61 



APPENDIX. 



COMPOSITION OF SOME COMPOUNDS IN FERTILIZERS. 



One hundred parts of: — 



Nitric acid contain 26 parts of nitrogen. 



Ammonia contain 82.35 parts of nitrogen. 



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



and 46.6 parts of potassium oxide. 

 Pm-e nitrate of soda (Chili saltpetre) contain 63.25 parts of nitric 



acid. 

 Chloride of potassium contain 52.4 parts of potassium, 63.1 parts 



of 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 phosjjliate) contain 46 parts of phosphoric 



acid and 54 parts of calcium oxide (lime). 

 Calcined gypsum contain 41 parts of calcium oxide (lime) and 59 



parts of sulphuric acid. 

 Uncalcined pure gypsum contain 32.5 parts of calcium oxide 



(lime), 46.5 parts of sulphuric acid, and 21 parts of water. 

 Carbonate of lime contain 56 parts of calcium oxide (lime) and 



44 parts of carbonic acid. 

 Sulphate of magnesia (free of water) contain 33.3 per cent of 



magnesium oxide (magnesia) and 66.6 per cent of sulphmic 



acid. 



C. A. GOESSMANN. 



Professor Goessmann asked instruction from the Board in 

 regard to presenting to tlie public tlie market-value of the 

 constituents of commercial fertilizers. The Board unani- 



