382 BOARD OF AGRICULTURE. 



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 4G.6 parts of potassium oxide. 

 Pure 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 phosphate) contain 46 parts of phos- 

 phoric 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 jmrts 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 sulphuric 



acid. 



C. A. GOESSMANN. 



The report was accepted. 



Mr. Ware read his paper upon " The Silo and Ensilage," 

 which was discussed and adopted. 



ESSAY ON THE SILO AND ENSILAGE. 



BY BENJ. P. WARE. 



The system of preserving grain, fruits, and forage in 

 subterranean vaults, in its green state, is spoken of by the 

 earliest writers as being commonly practised by the ancient 

 Romans, and has been practised by the Mexicans for cen- 

 turies. In France, Germany and other countries of Europe, 

 green crops of all kinds have been buried in pits for preser- 

 vation for more than fifty years with more or less success. 

 But to M. Auo;uste GotFart, a distino;uished member of the 

 Central Agricultural Society of France, belongs the honor 



