Elements of chemistry : including the applications of the science in the arts . the flame being greater, the luminous carbon is also heated to a higher degree ofwhiteness. BICARBURETTED HYDROGEN 285 BICARBURETTED HYDROGEN. Syn. Olefiant gas, Elayle; Eq. 28 or 350; C4H4; density ; \~T~] This gas was discovered in 1796, by certain associated Dutch chemists, who gaveit the name of olefiant gas, because it forms with chlorine a compound having theappearance of oil. It is usually prepared by heating together 1 measure of spiritsof wine with 3 measures of oil of vitriol, in a capacious retort,
Elements of chemistry : including the applications of the science in the arts . the flame being greater, the luminous carbon is also heated to a higher degree ofwhiteness. BICARBURETTED HYDROGEN 285 BICARBURETTED HYDROGEN. Syn. Olefiant gas, Elayle; Eq. 28 or 350; C4H4; density ; \~T~] This gas was discovered in 1796, by certain associated Dutch chemists, who gaveit the name of olefiant gas, because it forms with chlorine a compound having theappearance of oil. It is usually prepared by heating together 1 measure of spiritsof wine with 3 measures of oil of vitriol, in a capacious retort, till the liquid becomesblack and effervescence begins, and maintaining it at that particular temperature. Itis collected over water, which deprives it of a portion of ether vapour and sulphurousacid, with which it is accompanied. A process which yields a purer gas, and in larger volume, is the ounces of water are added to twice their volume of oil of vitriol, in alarge globular flask A (fig. 131), which gives an acid of about density when Fio. cool. Without waiting to cool, however, 24 ounce measures of spirits of wine areadded, and the whole allowed to stand for a night. The flask is supported on a bedof pumice over the gas-flame as already described (page 264), and the latter regu-lated so as to keep the liquid in a state of moderate ebullition. The gas evolved ispassed through two two-pound bottles, B and C, the first of which, B, is empty, orcontains only a little water at the beginning, and is intended for the condensationof a considerable portion of alcohol and ether which distil over, while C is half filledwith a strong solution of caustic potassa, to absorb the sulphurous and carbonic acidsproduced. These two wash-bottles are immersed in jars containing cold water. Thethird wash-bottle, D, contains oil of vitriol, and the U-tube E, pumice soaked in thesame fluid to absorb ether-vapour; while the gas is collected at last in bottles, F,ove
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