. How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture ... Agricultural chemistry; Growth (Plants). THE VOLATILE PABT OF PLANTS. 35. that has been weighed, being fourteen and a half times lighter than common air. It is hence )used in filling balloon s. Another property is its combustibility; it inflames on contact with a lighted taper, and burns with a flame that is intensely hot, though scarcely luminous if the gas be pure. Finally, it is itself incapable of supporting the com- ^'g- ''• bustion of a taper. Exp. 13.—AU these chara
. How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture ... Agricultural chemistry; Growth (Plants). THE VOLATILE PABT OF PLANTS. 35. that has been weighed, being fourteen and a half times lighter than common air. It is hence )used in filling balloon s. Another property is its combustibility; it inflames on contact with a lighted taper, and burns with a flame that is intensely hot, though scarcely luminous if the gas be pure. Finally, it is itself incapable of supporting the com- ^'g- ''• bustion of a taper. Exp. 13.—AU these characters may he shown by the following single experiment. A bottle full of hydrogen is lifted from the water over which it has been collected, and a taper attached to a bent wire, Fig. 7, Is brought to Its mouth. At first a slight explosion is heard from the sudden burning of a mixture of the gas with air that forms at the mouth of the vessel; then the gas is seen burning on its lower surface with a pale flame. If now the taper be passed Into the bottle it will be extin- guished ; on lowering it again, it will be relighted by the burning "gas; finally, if the bottle be suddenly turned mouth upwards, the light hy- drogen rises in a sheet of flame. In the above experiment, the hydrogen burns only where it is in contact with atmospheric oxygen; the pro- duct of the combustion is an oxide of hydrogen, the lini- versally diffused compound, water. The conditions of the last experiment do not permit the collection or iden- tification of this water; its production can, however, readily be demonstrated. Exp. 14.—The arrangement shown in Fig. 8 may be employed to exhibit. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Johnson, Samuel William, 1830-1909. New York, Orange Judd company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectagriculturalchemistr
