Huygens, Christiaan. 1629-95. Dutch physicist, mathematician. Discovered Saturn’s rings 1655. Pendulum clock 1657. Centripetal force 1659. Conservation of Energy 1669. Wave theory of light 1678.

Hyatt, John. 1837-1920. Celluloid 1870.

Hyde, Edward. 1609-74. English statesman, historian. Supported Charles II.

Hydra. Many-headed water serpent killed by Hercules.

Hydrogen Bomb. Thermonuclear or H-Bomb. 1952 US. 1953 USSR. 1957 Britain. 1968 France. 1971 China. 1974 India. ? Israel. Atomic Bomb.

Hyksos. Semitic invaders of Egypt on horse and chariot. Ruled 1675-1550BC.

Hymen. Greek god of marriage.

Hypatia. c370-415. Alexandrian Neoplatonic philosopher. Murdered by St. Cyril and monks. Decline of Alexandria as learning center.

Hyperion. Greek Titan.

Hypermestra. Only daughter of Danaus who didn’t kill husband. Danaïdes.

Hywell the Good. -950. Welsh king 910-. Law code.

I Am. 1934-. US religious movement founded by Ballard.

I Ching. 12C BC. Supplement 475BC. Chinese Book of Changes. 64 hexagrams used for divination. Early ethics, philosophy text.

Iamblichus. c250-330. Syrian NeoPlatonist philosopher. Theurgy replaces spiritual mysticism. De Mysteriis.

Iapetus. Greek Titan. Father of Atlas and Prometheus.

Iberia. c6C-65BC. Kingdom in southwest Russia.

Iberians. Prehistoric tribe of Spain.

Iberville, Pierre d’. 1661-1706. French-Canadian explorer to Louisiana.

Ibn al’Arabi. 1165-1240. Spanish Moslem mystical philosopher. Meccan Revelation 1201.

Ibn Battutah. 1304-68. Morrocan travel writer. Travels 1325-53.

Ibn Khaldun. 1332-1406. Arab historian/sociologist. Introduction to History 1375.

Ibn Sa’ud. 1880-1953. Conqueror and king of Riyad 1902-, + Najd, Hasa, Asir, Hejaz; united as Saudi Arabia 1932-. Ended tribal wars. First oil wells 1933.

Ibn Tufall. c1100-85. Arab philosopher. Havy Ibn-Yaqzan 1175.

Ibn Tumart. c1080-1130. Berber leader. Demanded moral reform. Founded Almohad Confederation.

Ibo. SE Nigerian tribe. Biafra.

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