CALIPPUS, or CALLIPPUS, an astronomer of Cyzicus,
who invented the period or cycle of 76 years, which is called after his name the Calippic. He went to reside at Athens, where he became acquainted with Aristotle, and engaged with that philosopher in rectifying the discoveries of Eudoxus. See CALENDAR, p. 79.
CALISTHENICS (καλος beautiful, σθένος strength), the science or practice of exercising the body and limbs for the purpose of promoting strength and graceful deportment.