Aalborg
one of the most ancient cities of Denmark, the capital of the district of the same name, in Jutland, on the Limfjord and on the Danish State railway. It is the seat of a bishop and has a cathedral, a museum, a library, and schools. It is important as a commercial and manufacturing center. Pop. about 35,000.
AAR (är), the most considerable river in Switzerland, after the Rhine and Rhone. It forms at Handeck, in the valley of Hasli, a magnificent waterfall of above 150 feet in height, and empties into the Rhine, opposite Waldshut, after a course of about 170 miles.
AARAU (ä'rou), a town in Switzerland, capital of the canton of Aargau, on the right bank of the Aar. Has manufactures of scientific instruments, silk, cotton, leather, and bells, a library, and historic, scientific, and ethnographic museums. Here, in December, 1797, the ancient Swiss confederacy held its last session; from April to September, 1798, it was capital of the Helvetic republic. Pop. about 10,000.