THE HEMMED OR FOLDED FOOT
Many old wine glasses are chipped at the edge of the foot; this was due to carelessness in the scullery sometimes, but often to careless use by convivial guests. Therefore glass-makers learned the advantage of folding the edge of the foot under, like a hem in needlework; a rounded edge, less likely to be chipped, was thus obtained. This “hem” is nearly always irregular, being turned in more at one part of the base than another. As a rule, the presence of a folded foot indicates that the glass was made before 1760.