Titles
- Moral Thermometer1
- Mormon Elders Damiana Wafers: Health, Strength and Energy1
- Morning Rounds: Children's Ward, Bellevue Hospital, N.Y1
- Mouth Mirrors1
- Myce1
- Myositis1
- Neurochondrodes1
- New and Improved Self-Acting Earth Closet1
- Nicotiana Tabacum1
- Nostalgia1
- Operating Theatre: Brooklyn Memorial Hospital for Women and Children1
- Operating Theatre: Presbyterian Hospital, New York1
- Ormsby's Ether Inhaler1
- Oronko Indian seated semi-recumbent in hammock1
- Osteosarcoma, first case of1
- Outline of Coca Plant1
- Ox yphonia1
- Perkins' Patent Dental Chair1
- Perspective Sketch1
- Perspective View of the North Front of the Retreat, near York1