Subjects
- Mexican War, 1846-1848.1
- Mines.1
- Mining industry--Colorado--1900-1910.1
- Mining.1
- Monetary policy--United States.1
- Money.1
- Monuments & memorials.1
- Monuments.1
- Mother and child.1
- Mountain railroads.1
- Mountains--Colorado--1900-1910.1
- Murder--California--San Francisco--History--19th century.1
- Murder--New York--New York--History--19th century.1
- Music.1
- Nativism.1
- Naval education.1
- Naval yards & naval stations.1
- Navy-yards and naval stations.1
- New York State Capitol (Albany, N.Y.)1
- Offices.1