CLACKMANNAN, a small town of Scotland, and capital of the county of that name, is situated on the northern shore of the Forth, in W. Long. 3. 40. N. Lat. 56. 15. It stands on a hill, on the top of which is the castle, commanding a noble prospect. It was long the seat of the chief of the Bruces, who was hereditary sheriff of the county before the jurisdictions were abolished. The large square tower is called after Robert Bruce, whose great sword and casque are still preserved here. The hill, with the tower, forms a picturesque object. Clackmannan had 3605 inhabitants in 1811, and is still the seat of the Bruces of Kennet.