Subject
- Hall, Charles Martin, 1863-19141
- Hall, Julia Brainerd, 1859-19251
- Haymarket Square Riot (Chicago, Illinois : 1886)1
- Hercules Powder Company1
- Horiba, Masao1
- Human remains (Archaeology)1
- Hurricane Katrina (2005)1
- Instant photography1
- International Business Machines Corporation1
- Invisible inks1
- Ion exchange1
- Ion exchange chromatography1
- Ion exchange--Research1
- Jamestown Settlement1
- Jābir ibn Ḥayyān1
- Khrushchev, Nikita Sergeevich, 1894-19711
- Knighton-Hammond, Arthur Henry, 1875-19701
- Knox, Lawrence1
- Knox, William1
- Kosher food industry1