Topic
- Steam-engines 6
- Steel industry and trade 6
- Mills and mill-work 5
- Overhead electric lines 5
- Signs and signboards 5
- Street photography 5
- Doors & doorways 4
- Grain --Storage 4
- Locomotives --Wheels 4
- Portrait photography 4
- Sheet-metal, Corrugated 4
- Photography of ships 3
- Railroad cars --Maintenance and repair 3
- Roundhouses (Railroads) 3
- Snow 3
- Abandoned buildings 2
- Abandonment of property 2
- Advertising 2
- Cargo ships 2
- Factories 2