The Whipple Library's special collections include numerous works on the subject of time and time-keeping, illustrating the breadth of its holdings. The collections encompass not only those works which describe the various chronometrical devices collected by Robert Whipple, but also books concerning geological time, chronology, the history and philosophy of time in general, or time as a special subject in physics and the theory of relativity. Some of these books are displayed here, alongside objects from the Whipple Museum's collections.