- Liberty Bell Center (Philadelphia, Pa.)2
- Liberty Bell.4
- Liquor laws.1
- Liturgies.2
- Locomotives.1
- Longcase clocks.1
- Mackey, Harry A. (Harry Arista), 1873-1938.1
- Manners and customs--United States.1
- Mansions.1
- Manufactures.1
- Manufacturing processes.1
- Marching bands--United States.3
- Marching bands.1
- Marching.1
- Marie, Queen, consort of Ferdinand I, King of Romania, 1875-1938.1
- McGraw, John Joseph, 1873-1934.1
- McInnis, John.1
- Medals.1
- Midshipmen.1
- Military ceremonies, honors, and salutes.1