Subjects
- Civil engineering.1
- Coal mining.1
- Coal.1
- Cog railroads.1
- Communication devices.1
- Construction.1
- Copper mining.1
- Cottages.1
- Cotton.1
- Cupid.1
- Dams.1
- Death.1
- Diesel locomotives.1
- Disasters.1
- Draperies.1
- Education--Pennsylvania--19th century.1
- Eiffel Tower (Paris, France)1
- Electricity.1
- Elevated railroads.1
- Emigration & immigration.1