- Fritz Haber (1868-1934)
- Born in Prussia.
- He synthesized ammonia from nitrogen and hydrogen.
- He was awarded the Nobel Prize in chemistry in 1918.
- Charles Martin Hall (1863-1914)
- Born in United States.
- He invented an electrochemical method of aluminum manufacture.
- John Wesley Hyatt (1837-1920)
- Born in United States.
- He invented celluloid.
