Subjects
- Camping--Oregon--1900-1910.1
- Canals.1
- Canoeing--Oregon--1900-1910.1
- Capitols.1
- Carriages & coaches.1
- Carts & wagons.1
- Cast ironwork.1
- Centennial celebrations--Missouri--Saint Louis--1900-1910.1
- Churches.1
- City & town halls--California--San Francisco--1900-1910.1
- Civil engineering.1
- Coal mining.1
- Coal.1
- Cog railroads.1
- Communication devices.1
- Construction.1
- Copper mining.1
- Cotton.1
- Dams.1
- Diesel locomotives.1