Ionia, the ancient name of the coast districts and islands of western Asia Minor.
Iowa City, capital of Johnson county, Iowa, and the seat of government from 1839 to 1856, is situated on the Iowa River, 120 miles by rail B. of Des Moines. The old capitol is now the state university. Pop. 7986.
Ipsambul. See Abu-Simbel.
Iquitos, a town in the Peruvian dep. of Loreto, on the left bank of the Maranon, 75 miles above the mouth of the Rio Napo. Pop. 8000.
Irak-Arabi (Arabian Irak), the most southeasterly district of Turkey in Asia, almost conterminous with ancient Babylonia, lies between the lower courses of the Tigris and the Euphrates. Pop. 2,000,000.
Iran, or Eran, originally the great Asian plateau bounded N. by the Hindu Kush and the Elburz, E. by the Indus, S. by the Persian Gulf, and W. by Kurdistan and the Tigris. The term is now the official designation of Persia.
Irish Sea, between the north of Ireland and the north of England, with the south-western counties of Scotland on the north, is connected NW. with the Atlantic by the North Channel, and S. by St George's Channel. Between the coasts of Louth (Ireland) and Lancaster it has its greatest width of 150 miles; its greatest length north and south is about the same. Within it lie the Isle of Man and Anglesey.
Iron Gates. See Danube.
Irrawaddy. See Irawadi.
Irtish, a river of Siberia, the chief affluent of the Obi (q.v.), rises at the east end of the Altai Mountains, passes through Lake Saisan, breaks through the Altai in the west at the bottom of a savage gorge, and flows north-westwards across the steppes of Western Siberia to join the Obi, from the left, at Samarow. At that point it has a width of 2000 yards; its total length is 1620 miles ; the area of its basin, 647,000 sq. m. The towns of Semipalatinsk, Omsk, and Tobolsk stand on its banks. Its tributaries include the Buch-tarma and Om from the right, and the Tobol and Ishim from the left.