Pendulum clock designed by Galileo in 1642 and made by his son in 1649, model. Time Measurement 1642-1649 (original); 1883 (model)
Nicholas Culpeper's statement about John Dee's crystal, England, 1651-1658 Ethnography and Folk Medicine 1651-1658
Horary quadrant consisting of front and reverse paper scales and wooden board made by Henry Sutton, Threadneedle Street, London, 1658. Horary quadrant by Henry Sutton Astronomy 1658