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Seabury safety water tube boilers, stationary and marine
Riddlesburg Blast Furnace (Riddlesburg, Pa.)
Iron shell open top blast furnaces with charging elevator
Advertisement for steel mill boilers
Lucy blast furnaces, Carnegie Brothers and Company (Pittsburgh, Pa.)
Novus boilers and tank heaters
Joanna Furnace, Joanna Township, Berks County, Pa.
Muck bar mill and puddling furnaces, Zug Iron and Steel Company
Blast furnaces and skip hoist skip car, Colorado Fuel & Iron Corporation
Joanna Furnace, Joanna Township, Berks County, Pa.
Iron shell open top blast furnaces with charging elevator
Blast furnaces (Palmerton, Pa.)
Open hearth furnace waste heat boiler
Joanna Furnace, Joanna Township, Berks County, Pa.
Blast furnace under construction, Bethlehem Steel Company (Lebanon, Pa.)
Hauck Burners for Foundries, Boiler, Machine and Repair Shops
The Duquesne Steel-Works at night
Francis G. du Pont and Harry Miller installing boilers at Old Stone Block
Blast furnaces with stock house and blower houses, Lower Works, Cambria Iron Works (Johnstown, Pa.)
Quick heat on cold winter mornings : national bonded jacketed square boilers
Iron shell open top blast furnaces with two or four pass stoves
Blast furnaces converted to tramway carrier system, Cambria Iron Works (Johnstown, Pa.)
Westinghouse Machine Company album
Superintendent William Ingram in conservatory boiler room at Longwood
Iron shell open top blast furnaces with three pass stoves

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