Ogee, or Ogive. In pieces of ordnance, an ornamental molding on guns, mortars, and howitzers.

Ogival. The form given the head of oblong projectiles. It was found by Borda that this shape experienced less resistance from the air than any other.

Ohio. One of the Western States of the American Confederacy, lying between Lakes Michigan, Erie, and the Ohio River. In 1680, La Salle explored the State, and built a military post on the Ohio, which the French claimed; but in 1763 they relinquished it. The first settlement was made subsequent to the Revolution, a company of New Englanders having settled at Marietta in April, 1788. The early inhabitants were much annoyed by incursions of the Indians, who had successively defeated Gens. Harmar and St. Clair (the latter with great slaughter of his troops, leaving scarcely one-fourth) in 1791 and 1792, but were themselves in turn utterly routed by Gen. Wayne in August, 1794. Ohio was admitted as a State in 1802. In the second war with Great Britain, Ohio suffered greatly from raids by the British and Indians. Fort Sandusky was attacked by Gen. Proctor, with 500 regulars and as many Indians, and was successfully defended by Maj. Croghan, a youth of twenty-one years, with 160 men. But the most important action which occurred was the naval engagement on Lake Erie, fought at Put-in-Bay, September 10, 1813, in which Commodore O. H. Perry defeated a superior British fleet under command of Barclay. Ohio contributed greatly to the cause of the Union in the late civil war; she sent her full quotas of troops to the field, and the women attended to the sick and wounded with untiring zeal. The State was twice invaded by Confederate guerrillas, but suffered no material damage.

Oillets, or Œillets. Apertures for firing through in the walls of a fort.

Ojibways. See [Chippewas].

Okanagans, or Cutsanim. A semi-civilized tribe of Indians who, to the number of about 300, reside to the east of the Cascade Mountains, in Washington Territory.

Olcades. An ancient people in Hispania Tarraconensis, north of Carthago Nova, nearer the sources of the Anas, in a part of the country afterwards inhabited by the Oretani. They are mentioned only in the wars of the Carthaginians with the inhabitants of Spain.

Oldensworth (Denmark). A conference was held here in 1713, between Peter the Great and Frederick IV. of Denmark.

Olifant, or Oliphant (Fr.). A horn which a paladin or knight sounded in token of defiance, or as a challenge.

Olinde. A sort of sword-blade.