This is a copy of the drawing made in 1659 by Galileo's friend and biographer, Viviani, of an incomplete design for a pendulum clock which Galileo made just before his death in 1642. The clock shown is certainly the first known attempt to apply a pendulum to control the rate of a weight- or spring-driven clock. The original drawing is in Italy. The Science Museum also has a 19th century model based on the drawing which shows the invention completed. (Inventory no: 1883-0029). The bottom right of the drawing has been partially formed digitally.
© Science Museum / Science & Society Picture Library