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.

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

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

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.

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.

Ibsen, Henrik. 1828-1906. Norwegian social and psychological dramatist. Peer Gynt 1867. Doll’s House 1879. Hedda Gabler 1890.

Icarus. Son of Daedalus, wings melted when he flew too close to the sun.

Ice Age. Last period of glaciation, c75000-8350BC.

Iceland. 9C Irish discover. 870 Norway colonized. 930 Althing. 1262 Norway. 1380 Denmark 1904 Home rule. 1918 Sovereignty. 1944 Republic.

Iceni. PreRoman British peoples in East Anglia. 60 Boadicia revolted vs Rome.

ICFTU. International Confederation of Free Trade Unions. 1949. Split from WFTU. Represents 70M workers in 89 countries. IFTU.

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