Subjects
- Laboratories.1
- Laxatives.1
- Lead poisoning.1
- Leukemia.1
- Life (Biology)1
- Light.1
- Liver.1
- Log cabins.1
- Lumber industry.1
- Lungs.1
- Lymphatics.1
- Malaria.1
- Marijuana.1
- Masturbation.1
- Measles.1
- Medical instruments and apparatus.1
- Medical jurisprudence.1
- Medicine -- History.1
- Medicine -- Study and teaching.1
- Medicine, Military.1