. Scientific American Volume 85 Number 06 (August 1901) . atic coke-drawers and car-loadershave supplanted hand labor. One great trouble withthe bee-hive oven is the impossibility of obtaining byit an absolute uniformity of the product. To improve the process of manufacture, larger chargesand increased natural air drafts have been employed,but with no decided results. The bee-hive ovens erectedduring the past two years are somewhat larger in sizethan the old ovens. There have also been variousminor changes. In the bee-hive oven the mass of coal,as it fuses into coke, swells and rises. If, on q
. Scientific American Volume 85 Number 06 (August 1901) . atic coke-drawers and car-loadershave supplanted hand labor. One great trouble withthe bee-hive oven is the impossibility of obtaining byit an absolute uniformity of the product. To improve the process of manufacture, larger chargesand increased natural air drafts have been employed,but with no decided results. The bee-hive ovens erectedduring the past two years are somewhat larger in sizethan the old ovens. There have also been variousminor changes. In the bee-hive oven the mass of coal,as it fuses into coke, swells and rises. If, on quench-ing, it falls back to its original bulk, it makes a hardcoke; if not, a soft coke is the result. There is alsoa lack of uniformity of porosity which is necessary togive toughness and hardness to a furnace or foundryfuel. The general reduction of the coking industry to ascience awaits the introduction of the by-product cokeoven wherein the coal is coked in an airtight chamberand an absolute uniformity of the product i<? assured. August io, 0 .
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Keywords: ., boo, bookcentury1900, bookdecade1900, booksubjectair, bookyear1901
