Corsets in one form or another have existed since biblical times. By the 19th century, they were so firmly entrenched in feminine life that it seemed impossible to live without them. These foundation garments altered more than the figure -- their restrictions affected the wearer's behavior as well as impressions of her character. Until they were supplanted by diet and exercise, corsets offered the customary means of obtaining the currently popular shape: the rigidly flat torso and raised bosom of the seventeenth century; the eighteenth century's shoulders-back, flat-stomached, high-busted...