CONSTANCE, one of the most considerable and beautiful lakes of Switzerland, which separates it from Suabia, except that part where the city of Constance is seated on its side. It is divided into three parts; the upper or largest part is called Boden see, the middle Bodmer see, and the lower part Zeller see. The first is 37 miles long, and its greatest breadth 15 miles: it is deeper in summer than in winter.