AARAU, the chief city of the canton of Aargau, situated on the right bank of the river Aar, at the south base of the Jura. It is well built, paved, and lighted, and contains 4500 inhabitants, whose principal occupations are spinning and weaving cotton, making silk ribbons, bleaching, and casting cannon. Lat. 47.23.35. N., Long. 6.2.55. E. The famous baths of Schintzach are about ten miles distant along the right bank of the Aar. The inhabitants are chiefly Protestants.