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Pendulum clock designed by Galileo in 1642 and made by his son in 1649, model.
1642-1649 (original); 1883 (model)
Spring-driven pendulum clock by Johannes van Ceulen of The Hague, c. 1695
Nicholas Culpeper's statement about John Dee's crystal, England, 1651-1658
Ethnography and Folk Medicine