Hi I saw your message on the museum discussion list, are you aware of the collections & displays at the Old Royal Observatory, Greenwich Maritime Museum, London, UK? As well as covering the history of the observatory & the need for time measurements in navigation they also have more abstract discussions about time etc. JaneMs F.J. Sarre [log in to unmask] Dept. of Museum Studies, University of Leicester, 103-5 Princess Rd East, Leicester