a river of North America. It is formed by the junction of the Alleghany and Monongahela rivers, which unite at Pittsburg, and take the name of Ohio. After a course of 1188 miles, it falls into the Mississippi in lat. 37° receiving fifteen rivers in its progress. During the high water of spring and autumn it is navigated by ships of 300 tons, and at all seasons by boats. The rapids at Louisville are the only obstruction; but the navigation will be continued here by a canal.

the name of one of the United States of North America. It has the river Ohio on the south, Lake Erie and the Michigan territory on the north, Pennsylvania on the east, and Indiana on the west. It covers an area of 40,000 square miles. The surface is generally undulating, and towards the middle of the state is broken by low hills. The soil, which rests on limestone, has generally a great depth, and is remarkably fertile. It is watered by many large rivers, which are well stored with fish, and nearly all navigable. There are several salt springs, and coal is abundant. The mean heat of the climate at Cincinnati is 54° of Fahrenheit. The population in 1800 was only 42,156; but in 1810 had increased to 230,760, and in 1816 was estimated at 450,000. There are besides about 3000 Indians in the north-western parts. Slavery does not exist in this state. The average crop of Indian corn is reckoned 45 bushels an acre, of wheat 22, of rye 25, of oats 35, and of barley 30. Flax and hemp are cultivated, and a little tobacco, but cotton does not thrive. Vines, however, have been found to succeed. The price of good cleared land varies from two dollars to forty, according as it is near market towns. In 1810 there were three millions of pounds of maple sugar made in this state; a single tree yielding about 10 pounds. This territory was formed into a state and admitted into the Union in 1802. See United States, Supplement.

OHETEROA, one of the South sea islands lately discovered, is situated in W. Long. 150° 47' S. Lat. 22° 27'. It is neither fertile nor populous, nor has it any harbour or anchorage fit for shipping; and the disposition of the people is hostile to such as visit them.