Subjects
- Spanish-American War, 1898--Philippines.1
- Spanish-American War, 1898--Postal service.1
- Spanish-American War, 1898--Puerto Rico.1
- Spanish-American War, 1898--Social aspects.1
- Spanish-American War, 1898--United States.1
- Spanish-American War, 1898--Women.1
- Steamboats.1
- Stereograph industry--1910-1920.1
- Stereograph industry.1
- Stereoscopes.1
- Stern wheelers.1
- Stone bridges.1
- Street railroads.1
- Strikes.1
- Strip mining.1
- Students--Colorado.1
- Suffragists.1
- Sugar industry.1
- Summer employment.1
- Suspension bridges.1