| http://www.w3.org/ns/prov#value | - 'This invention relates to furnaces for smelting iron ore, and has for its object to dispense with the 'tymp' or forehearth and the 'wall stone' now in common use in iron blast furnaces, and to replace the tymp arrangement by such a construction as allows the slag to certain improvements in blast furnaces with a closed breast; and it consists, principally, in a blast furnace with a closed breast,
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