Subject
- Marching bands--United States.1
- Medicine.1
- Military maneuvers.1
- Musicians--United States.1
- New York (N.Y.). Police Dept.1
- New York (State). National Guard.1
- Nurses.1
- Olaya Herrera, Enrique Alfredo, 1880-1937.1
- Optical illusions.1
- Optics.1
- Organ music.1
- Ortiz Rubio, Pascual, 1877-1963.1
- Pathé frères (France)1
- Performing arts and children.1
- Physics.1
- Pianists.1
- Piano music.1
- Police--United States.1
- Politicians--Mexico.1
- Polo Grounds (New York, N.Y.)1