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Ohio admitted as State (1802), 78.

Ohio Company of Associates, 72.

Ordinance of 1784, 67, 69-71, 75.

Ordinance of 1785, see Land Ordinance of 1785.

Ordinance of 1787, Congress adopts, 72; stimulus from Ohio Company, 72-74; authorship, 75; provisions, 75-77; successful operation, 77-80; text, 190-200.

Oregon, question of military occupation (1825), 77-78.

Otto, Louis, French Chargé d’Affaires, letter to Vergennes, 100-103.