Iron industry and trade History 58 Steel industry and trade 19 Iron foundries 10 Tariff 7 Biography 5 Blast furnaces 5 more ... Economic conditions 5 Iron mines and mining 5 Coal mines and mining 4 Industries 4 Iron-works 4 Railroads 4 Cast-iron 3 Description and travel 3 German Americans 3 Glass manufacture 3 Histoire 3 Ironwork 3 Bituminous coal industry 2 Businessmen 2 Charcoal 2 Colonies 2 Commerce 2 Family 2 Fer 2 Forge shops 2 Furnaces 2 Historic sites 2 Industrie et commerce 2 Iron founding 2 Mines and mineral resources 2 Quakers 2 Social life and customs 2 Societies, etc 2 Travel 2 Account books 1 America 1 Américains d'origine allemande 1 Anthracite 1 less ...