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- Architectural photography 2
- Architecture 2
- Basic oxygen furnaces 1
- Blast furnaces 3
- Buildings 1
- Chains 1
- Coke-ovens 1
- Factories 2
- Industrial equipment 12
- Iron and steel workers 5
- Metals --Finishing 1
- Milling machinery 11
- Mills and mill-work 21
- Mines and mineral resources 1
- Open-hearth furnaces 3
- Photography of railroads 1
- Photography, Close-up 1
- Photography, Industrial 21
- Railroad cars 2
- Railroad rails 2