A popular chemistry; . the chimney of the a time, a large quantity having collected, weare startled by the cry, The chimney is on fire !while with a great roar and flame the soot burnsout. This unpleasant occurrence is much more fre-quent when green wood is used for fuel. The H20of the wood absorbs much of the heat of the fire,and so permits the C to pass off unconsumecl. Charcoal is made by burning piles of wood, socovered over with turf as to prevent free access ofair. The volatile gases, water, etc., are driven offand the C left behind. This forms about f of thebulk of the wood
A popular chemistry; . the chimney of the a time, a large quantity having collected, weare startled by the cry, The chimney is on fire !while with a great roar and flame the soot burnsout. This unpleasant occurrence is much more fre-quent when green wood is used for fuel. The H20of the wood absorbs much of the heat of the fire,and so permits the C to pass off unconsumecl. Charcoal is made by burning piles of wood, socovered over with turf as to prevent free access ofair. The volatile gases, water, etc., are driven offand the C left behind. This forms about f of thebulk of the wood and \ its weight. Charcoal forgunpowder and for medicinal purposes is preparedby heating willow or poplar wood in iron retorts. Coke is obtained by distilling the water, tar, andvolatile gases from bituminous coal. It is burned inlocomotives, blast-furnaces, etc. Gas-carbon is formed on the interior of the re-torts used in coal-gas works. It has a metallic luster,and will scratch glass. 58 IKORGAHIC CHEMISTRY. Fig.
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Keywords: ., bookcentury1800, bookdecade18, booksubjectchemistry, bookyear1887
