Science for beginners . tove are generally not able to supply enoughoxygen and maintain at the same time a temperature highenough to burn the volatile matter immediately after throwingfresh coal into the fire. Consequently smoke issues from thechimney as long as there is much volatile matter being pro-duced from the coal. After the volatile matter has been 90 THE PRODUCTION AND USE OF HEAT set free, smoke ceases to escape from the chimney until afresh charge of coal is thrown into the stove. If smalleramounts of coal could be thrown in at shorter intervals oftime, it might be that the drafts o
Science for beginners . tove are generally not able to supply enoughoxygen and maintain at the same time a temperature highenough to burn the volatile matter immediately after throwingfresh coal into the fire. Consequently smoke issues from thechimney as long as there is much volatile matter being pro-duced from the coal. After the volatile matter has been 90 THE PRODUCTION AND USE OF HEAT set free, smoke ceases to escape from the chimney until afresh charge of coal is thrown into the stove. If smalleramounts of coal could be thrown in at shorter intervals oftime, it might be that the drafts of the stove would be able tosupply enough oxygen to burn the volatile matter as fast asit is produced by the coal. Since it is not convenient to placefrequent small charges of coal in the stove, the other methodcommonly resorted to in smokeless combustion is the gradualand slow distillation of the volatile matter in the soft coal, sothat the drafts can furnish oxygen fast enough to consume thevolatile matter J^^> 1 ig. 66.—Stove with air blast.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscience, bookyear1921
