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2f hours 50 per cent 61 charges air and gas alumina apparatus Bessemer pig brick brown hematite calcined Catalan cester cheap checkerwork cooling tube direct process dols early furnace ending February 24th experimental expose fresh surfaces favourable localities fettling firebrick flame fluid four furnacemen furnace balled furnace cinder furnace endures furnaces going hammer scale hammered billets hammered into billets hydro-carbons impure insufficient heat iron saved last rotator Limestone line of lumps materials melted midfeather neck ring Newton open-hearth bath open-hearth process open-hearth steel operation oxidising oxygen Phosphoric acid phosphorus pig iron puddled balls reduced refractory regenerator chambers reheated balls reheating furnace revolve roll scale rotator at Towcester Rotator Slag shovelled Siemens Silica Metallic iron squeezed balls contain squeezer steam power stick suitable TABLE tap-cinder tap-hole Three furnaces require Total ore 2240 waste week ending February yield of hammered