Pendulum clock designed by Galileo in 1642 and made by his son in 1649, model. 1642-1649 (original); 1883 (model)
Book, "Petri Gassendi Institutio astronomica : juxta hypotheseis tam veterum quam recentiorum / Cui accesserunt Galilei Galilei Nuncius sidereus, et Johannis Kepleri Dioptrice", by Pierre Gassendi and Galileo Galilei, London, and published by impensis H. Dickinson, 1683. Located at the Science Museum Library at shelfmark: O.B. GAS GASSEND. Book, "Petri Gassendi Institutio astronomica..." 1683