...stone; a device well deserving to be known, and due to the ingenuity of Facundus Novus, the mathematician. On an ancient bas-relief at Rome, an hour-glass is placed in the hands of Morpheus, and Athenaeus says that the ancients carried portable hour-glasses with them as measurers of time. The ancients had three time-measurers, — dials, hour-glasses, clepsydras. Alfred the Great added wax t...