Subject
- Homburger, Veit Löw , 1810–1871
- Homburger, Wolfgang1
- Homework1
- Honeymoons1
- Hoppe-Seyler, Felix, 1825-18951
- Horiba, Shinkichi, 1886-19681
- Horsemanship1
- Hospitals1
- Hotels1
- House furnishings1
- Hullet, George Augustus, 1867-19551
- Humboldt, Hildegard1
- Hundt, Friedrich, 1807-18871
- Hydrazine1
- Hydrocyanic acid1
- Hydrogen1
- Hydrogen ions1
- Hydrogen peroxide1
- Hyperthyroidism1
- Ideal gas law1