A popular chemistry; . oves and at the tops of tall furnace-chimneys. It is often formed abundantly throughthe action of heated carbon on C02. When airenters at the bottom of a clear fire, C02 is formedat once ; but this gas passing through the hot em-bers takes up a further quantity of C, becomingchanged into CO:* C + C02 = 2CO, the volume ofthe gas being exactly doubled in bulk thereby. COis a deadly poison, and escaping from coal-fires in aclose room, has often produced death. Both CO andCO2 leak through the pores of cast Fe when heated,and still further injure the air of our houses andnece
A popular chemistry; . oves and at the tops of tall furnace-chimneys. It is often formed abundantly throughthe action of heated carbon on C02. When airenters at the bottom of a clear fire, C02 is formedat once ; but this gas passing through the hot em-bers takes up a further quantity of C, becomingchanged into CO:* C + C02 = 2CO, the volume ofthe gas being exactly doubled in bulk thereby. COis a deadly poison, and escaping from coal-fires in aclose room, has often produced death. Both CO andCO2 leak through the pores of cast Fe when heated,and still further injure the air of our houses andnecessitate ventilation. The offensive .odor whichcomes out on opening thedoor of our coal-stovesis caused by the com-pounds of S mixed withthe CO. Marsh Gas.—Light Car-ouretted Hydrogen, CH4.— This we have alreadyspoken of under C02, asthe dreaded fire-damp of miners. It is colorless, tasteless, odorless, and burnswith a pale yellowish flame. It is formed in swampsand low marshy places by the decomposition of Fig. Collecting Marsh-gas. * This fact is of great importance, since thereby much heat is are often so constructed as to admit fresh air just above the grate,thus consuming this gas. 72 INORGANIC CHEMISTRY. vegetable matter, and on stirring the mud beneath,will be seen bubbling up through the water. It maybe collected in the manner shown in Fig. 30. Itrises from the earth in great quantities at manyplaces. At Fredonia, N. Y., it is used in lighting thevillage. At Kanawha, Va., it was, until lately, em-ployed as fuel for evaporating the brine in themanufacture of salt. In the oil-wells of Pennsyl-vania, it frequently bursts forth with explosive vio-lence, throwing the oil high into the air. defiant Gas.—Heavy Carburetted Hydrogen, C2H4.—This is a colorless gas, with a sweet, pleasant odor,and burns with a clear white light.* It may beeasily prepared by heating in a large retort a mixt-ure of one part of alcohol Avith six of H2S04. Coal-Gas is a varia
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Keywords: ., bookcentury1800, bookdecade18, booksubjectchemistry, bookyear1887
