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.

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

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.

Iapetus. Greek Titan. Father of Atlas and Prometheus.

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

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

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

Ictinus. 5C BC. Greek artist/architect. Parthenon.

Idealism. Artistic school of thought holding the aesthetic ideal more important than the representation of the subject. vs Realism.

Idealism, Ethical. Moral and intellectual ideals are superior to materialistic concerns.

Ides of March. (March 15th). Day on which Caesar was assassinated.

Idris. Mythic Welsh giant.

Ignatius of Antioch, St. -c107. Syrian martyr. Clarified Catholic beliefs. -“Catholic Church”.

Ignatius of Constantinople, St. c799-877. Greek Catholic Iconophile.

Illyrian Wars. 229BC~219BC. Romans defeat Illyrian pirates. Greeks recognize Romans as civilized, admit them to games.

Immaculate Conception. 1854. Established as RC dogma.

Immigration Acts. 1962. Britain limits immigration from Commonwealth.

Imperial Conferences. 1907-37. Meetings of British Empire/Commonwealth countries.

Imperial Preference. 1932-58. British movement for preferential tarrifs within British Empire.

Impressionism. 1867-86. European art movement named 1874 for Monet’s Impression Sunrise. Direct from nature with colors to render surfaces and lighting effects. Rejected primacy of subject. Renoir, Pissarro, Degas, Cezanne, Manet. Music: 1892-1910. Restraint and ambiguity. Mood music. Debussy.

Independents. Separatists. 17C English Christian sects believing that congregation should control its own affairs. Congregationalism. Puritans.

Index Expurgatorius. 1601- Vatican list of books to be expurgated.

Index Librorum Prohibitorium. 1564-1966. Vatican list of prohibited reading.

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