Elements of scientific agriculture, or, Elements of scientific agriculture, or, The connection between science and the art of practical farming : prize essay of the New York State Agricultural Society elementsofscien00nort Year: 1851 HYDROGEN. 7 owing to its power of absorbing gaseous and other substances, itself being full of pores. Both the flame that we see in wood, and the bright glow of coal fires, are owing to the burning of carbon; the flames of candles, of oil lamps, of ordinary coal gas, are all colored by the combustion of this substance. It will soon be seen that it constitutes a v
Elements of scientific agriculture, or, Elements of scientific agriculture, or, The connection between science and the art of practical farming : prize essay of the New York State Agricultural Society elementsofscien00nort Year: 1851 HYDROGEN. 7 owing to its power of absorbing gaseous and other substances, itself being full of pores. Both the flame that we see in wood, and the bright glow of coal fires, are owing to the burning of carbon; the flames of candles, of oil lamps, of ordinary coal gas, are all colored by the combustion of this substance. It will soon be seen that it constitutes a very large proportion in the organic part of all vegetables and trees. Hydrogen, as I have said, is a gas, or kind of air. It is transparent, tasteless, colorless and inodorous. As we can not smell, taste or see it, we can only judge of its properties by its action with other bodies. For this purpose it is obtained by putting pieces of zinc or iron filings into water, and then adding sulphuric acid, that is, the common oil of vitriol. About a third as much acid as water should be used. The mixture will soon grow warm, and hydrogen gas will at once commence rising to the surface in little bubbles. a. If a glass be laid upon the top of the tumbler containing the mixture, so as to prevent the too rapid escape of the gas, the tumbler will in a few moments become so filled that the gas will burn when a flame is brought into contact with it. 6. By far the most ^^ ^ satisfactory method is to conduct the opera- tion as represented in fig. 1. In the bottle are placed the sul- phuric acid, zinc, and water. The mouth of the bottle is stopped tightly by a cork, through which passes one end of the tube a (this may be of glass or tin); the other end passes under water in the cistern 6, its course being
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